The Big Bang Theory

Penny and Leonard ’s family relationship timeline was a chaotic one throughThe Big Bang Theory . From neighbors to Quaker to lovers to acquaintance again … These two have had their fair share of raspy patch in their friendship and relationship .

The more Leonard and Penny became comfortable with each other , the less spartan their argumentation experience . They bed where the other person was coming from and did n’t take things too personally . However , there were rare second where small tiff turned into shove along - up competitiveness , which sham   the   whole radical - especially Sheldon .

When Penny Invited Her Brother To Stay With Them (Without Talking It Over With Leonard)

In ' The Emotion Detection Automation , ' Penny tells Leonard that her brother was on a upright course and wants him to move in with them for a footling while he gets on his feet in Los Angeles . This bothered Leonard for a few intellect . For starters , Penny never ran the mind past Leonard . Secondly , Penny ’s brother does n’t have the keen cart track record and could take advantage of them . Lastly , invite another mortal to move in with them ( after Sheldon and Raj ) could bring to the musical theme of them not being able to live alone .

Considering the couple had on-going conversation about them subconsciously weaken their family relationship , this plot line made no sensebecause it was as if Penny forgot one of their biggest conversations . As bad as this argument was , it was n’t their bad .

Leonard’s Hidden Bank Account Hurt Penny

While playing a secret plan ofNever Have I Everwith Sheldon and Amy , Sheldon allow the hombre out of the grip that Leonard had a bank report that Penny did n’t know about . This upset Penny because they were get hitched with and she has always been very reliable about her financial problems .

But it was because of her fiscal trouble that Leonard kept it a mystery in the first position . Leonard could n’t swear Penny with his extra money , which was another argument entirely . But what it do down to was Penny being unfulfilled in her job and only doing it to make money and give off her debts . This was n’t the worst thingLeonard did , but Penny could n’t allow go of it .

When Penny’s Musician Friend Was Staying With Her

Early on in their kinship , Leonard was nettle when he find out one of Penny ’s friends ( and ex ) from Nebraska was coming to Los Angeles for some session work and break up on her lounge . He did n’t care the thought of a man remain with his girlfriend , peculiarly since she did n’t talk to him about it .

This argument became a enlargement because Sheldon was in the middle . This was an argument that show how close Sheldon and Penny were because he could n’t stand when Penny and Leonard were argue . They oppose about her friend for the entire episode until they eventually consort that he could stay on Sheldon and Leonard ’s sofa or else .

Penny’s Cynicism Ruined Valentine’s Day

It ’s here that the fights between Leonard and Penny became more serious . As much asfans rooted for Penny and her relationshipwith Leonard , she fuddle lover in ' The Tangible Affection Proof . '

In the instalment , Penny and Leonard went out for Valentine ’s Day dinner with Bernadette and Howard . The dinner was fail well until Penny witness her ex - boyfriend across the restaurant getting engaged to the womanhood he left her for . Penny start comparing herself to the other woman , which spiraled into comparing relationships . Penny deflower the intact meal for everyone — specially Leonard .   As Penny ’s boyfriend , Leonard could n’t help but feel unsafe over Penny ’s aversion for their relationship and her life .

Leonard Didn’t Trust Penny With Cole

It ’s contradictory that Leonard did n’t confide Penny around any attractive adult male when he was the one that terminate up chisel in their relationship . He showed his insecurities when Penny had a college project with a man in her class who happened to be from London .

Leonard did n’t want Penny around a handsome man with an emphasis and made a fool of himself trying to intimidate the guy . Penny found out about Leonard ’s actions and was incredibly embarrassed . His behavior also showed all of the cracks in their kinship , make it a distressing night for Penny .

Leonard Also Didn’t Trust Penny’s Smarts

In another dissension over Penny ’s living as a college student , Leonard panicked when he translate some of Penny ’s newspaper for a class of hers . want her to succeed , Leonard edit the paper while she slept . Leonard rewrote the composition and pose it to Penny imagine she ’d be well-chosen with him . In world , Penny feel disrespected .

Leonard had no religion in her intelligence and took matters into his own hand . It was times like this thatLeonard and Penny ’s relationship made no sense . He should have known her well enough to know that ’s the last thing Penny wanted or need .

Penny Felt That Leonard Was No Longer Trying In Their Marriage

In ' The Romance Recalibration , ' Penny begin to intend that Leonard did n’t put enough effort into their family relationship . She felt like he did n’t do anything romantic or seraphic for her any longer and he was too well-situated . Leonard object , of course , because he mat his effort was the only reason why they were together . This spiraled into a dismal argument .

To unclutter her head , Penny and Amy went away for a girls ' pickup . At this pointedness in Amy and Penny ’s friendly relationship timeline , they were best friends whose dispute help each other gain perspective . While Amy was helping Penny , Leonard and Sheldon barge in their getaway to create a relationship understanding for Leonard and Penny . However , it was not easy beat to this degree .

Penny’s Surprise Marriage To Zack

On Thanksgiving , everyone determine out that Penny was married to her ex - boyfriend Zack . Penny thought the Las Vegas marriage were a sham but it took Sheldon , Amy , and Leonard to secure her that they were real . This meant that Penny was matrimonial to Zack and neither of them knew it .

Leonard was enrage that Penny was unwittingly splice to Zack because this intend she saw a hypothetical future with Zack and not him . Whenever Leonard proposed to Penny she always shot him down – proving that possibly Leonard was n’t unspoiled enough . Penny was bothered by how much this spite Leonard and she felt an unnecessary pressure from him that she did n’t appreciate . This was one of their worst arguments yet .

Leonard’s Wandering Eye Ruined The Start Of Their Marriage

After being affiance for years , Penny and Leonard finally agreed to put their difference aside and to get hook up with in Las Vegas . On their way to the chappel , Leonard accommodate that he cheated on Penny when he was off at sea . At that moment , Penny could have easy dumped Leonardbut she bear on with the wedding anyway .

As bad as that conversation was , the aftermath of Leonard ’s decision was when the arguing set about . Penny felt that Leonard counteract their human relationship and wonder if getting marital was work to fix their egress . Since this argument / discussion lasted multiple episodes , it was one of their regretful .

The Topic Of Children Was A Shift In Their Marriage

In the episodes leading up to the finale , the topic of kids became more of a conversation . When Leonard brought up kids , Penny lied and said she ’d maybe require them in five+ years . It was n’t until afterward that Leonard find out that Penny modify her mind and did n’t want kids at all . This was a make - or - better situation in their human relationship .

Leonard always wanted tiddler and was n’t sure he could be with someone who did n’t want kids . This was a hard realism for Penny since she did n’t realize Leonard wanted them that poorly . Things take a strange turn when Zack and his new married woman asked Leonard to be their spermatozoon donor . This was one of Leonard ’s only chances to have a kid , but Penny did n’t need him to go through with it . The ongoing give-and-take was one of their worst and most sullen arguments . Luckily for Leonard , he found out Penny was pregnant in the series finale .

NEXT : Why Leonard Is Actually The Show ’s Main Character

The Big Bang Theory Poster

Three split images of Penny and Leonard fighting on TBBT

The Escape Hatch Identification - Penny and Leonard on the couch on TBBT

Leonard and Penny argue at the cabin in The Big Bang Theory

Penny’s Musician Friend sleeping on TBBT

Penny at dinner with Leonard on TBBT

Cole and Leonard talking on TBBT

Penny and Leonard argue about college on TBBT

Penny and Amy talking to Sheldon and Leonard on TBBT

Penny finds out she has been married to Zack on Thanksgiving on The Big Bang Theory

Leonard and Penny look serious in the car on TBBT

Side by side image of leonard and penny talking to zack on the big bang theory

The Big Bang Theory