Leonard goes home and tells her heвЂ™s decided not to be a donor for Zack and Marissa after realizing he would be heartbroken to know he had helped create a child and could not be its father. Does she simply not want to be connected to her ex forever? Yeah, sheвЂ™s never expressed any desire to remain close with Zack.Д«ut thereвЂ™s another reason, too, and itвЂ™s one of PennyвЂ™s most thoughtful expressions of how much she cares for Leonard ever. Is Penny having second thoughts about having a baby herself? DoesnвЂ™t seem like it. Not only does this lead to a few obligatory jokes from Sheldon about understanding the need to run away from a frisky wife, it prompts a just-awakened Amy to point out to her couch-surfing surprise guest that perhaps his wife isnвЂ™t as onboard as she had claimed to be with LeonardвЂ™s generous offer. He flees across the hall to Sheldon and AmyвЂ™s apartment in the middle of the night to avoid his wifeвЂ™s attempts to ruin his volunteer efforts. But when Leonard has to refrain from sex for several days before making a deposit at the baby bank, Penny suddenly slides into bed wearing new lingerie, whispering sweet nothings from a Batman comic book in her husbandвЂ™s ear.

Penny has been saying sheвЂ™s fine with it. WyattвЂ™s queries regarding whether Penny and Leonard are sure about their decisionsВ vis-Г -visВ having a little Hofstadter makes them reexamine how they really feel about LeonardвЂ™s plan. All he was actually signing on for was to be a sperm donor, with no guarantee of being part of the life of the offspring heвЂ™d have helped bring into existence.

The problem with that thinking - as a visit from PennyвЂ™s dad, Wyatt (Keith Carradine), and some sleepy words of wisdom from Sheldon and Amy help bring to the fore - is that Leonard was really looking to be a father. If Penny doesnвЂ™t want to have a child with him, as sheвЂ™s made clear she does not, at least he could pass his Leonard-ness on to someone else, he reasoned. Though Zack and PennyвЂ™s brief Vegas marriage made the request an awkward one, Leonard said yes. It certainly seemed like a genuine possibility when Leonard went against PennyвЂ™s wishes and agreed to be a sperm donor for dimwitted Zack (Brian Thomas Smith) and his new wife Marissa (Lindsey Kraft) earlier this season. I mean, right? DoesnвЂ™t that all sound a little too soap opera-y to be a thing youвЂ™d want to be true about The Big Bang Theory in its final run of episodes? This is a relief: Leonard has decided not to go through with being the biological daddy of his wifeвЂ™s ex-husbandвЂ™s baby.

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