Her relationship with Leonard would likely deepen. They would have to rely on each other more, and Penny might become more vulnerable with him. This could lead to a more mature and loving relationship as they face the challenges of impending parenthood together. She would also start to see Leonard in a new light, as a future father and a more stable figure in her life.
She might become more responsible. Penny has always been a bit carefree, but pregnancy could force her to think about the future more. For example, she may start to save money or look for more stable acting jobs.
Leonard would likely become even more protective of Penny. Their relationship would deepen as they face the new challenges of impending parenthood together. He might start to take on more domestic responsibilities, like making sure Penny has a healthy diet during her pregnancy.
There might be a fanfiction where Penny is pregnant and she starts to feel really isolated because she's the only one in the group going through this. She misses her old life a bit, and the story could be about how she overcomes these feelings with the support of her friends and Leonard. It's very emotional as it deals with her internal struggles.
There are many possible fanfictions on this topic. One could imagine that in the fanfiction, Penny's pregnancy might bring a new dynamic to her relationship with Leonard. For example, they could become more protective of each other and start planning for their future as parents more seriously. It might also affect their friendships with Sheldon and the others. Sheldon, who is not always good with changes, might initially struggle to adapt to Penny being pregnant and the new baby in their lives.
There could be a fanfiction where Penny's pregnancy makes Leonard super nervous. He starts freaking out about being a dad and all the responsibilities. Meanwhile, the rest of the gang tries to support them in their own clumsy ways. It's interesting to see how the characters' relationships develop during this big life change.
Well, their relationship could become even closer. Sheldon might become more protective of Amy. He would be constantly worried about her well - being and that of the baby. For example, he could start monitoring her diet very strictly, which might annoy Amy at times but also show his care.
As far as I can remember, there is no such Penny wedgie incident in The Big Bang Theory. The series was filled with different kinds of comical situations. For example, there were Sheldon's idiosyncrasies, Howard's attempts to pick up women, and Raj's selective mutism. But a wedgie incident for Penny just doesn't seem to be part of the storylines.
Imagine Penny cosplaying as a sexy character from a fantasy world. She might have chosen a costume inspired by an elven princess but with a more modern and alluring twist. Her long blond hair is styled in loose waves, and she has a tiara on her head. As she walks into Sheldon and Leonard's apartment, they are both in awe. She then starts to act out some of the character's mannerisms, like speaking in an elegant accent and making grand gestures. This not only amuses her friends but also makes her the center of attention at the little gathering they have.
Howard and Bernadette would have a more experienced perspective. Bernadette would share her own pregnancy stories with Amy, both the good and the bad. Howard would probably make some corny jokes about the situation, but deep down be really happy for his friends. All the characters would come together to form a sort of support system for Amy and Sheldon during this big life change.
Another plot could be Penny dealing with the challenges of her acting career while pregnant. Maybe she gets offered a role that she really wants but is worried about how her pregnancy will affect it. This could lead to some interesting drama as she tries to balance her dreams and her new family situation.
A lot of fanfiction could explore Penny's emotions during her pregnancy. She might be excited but also a bit scared. In the fanfic, we could see her relying more on Leonard for emotional support. And the gang could throw her a really special baby shower, filled with nerdy and fun elements, like Star Trek - themed baby clothes or a cake shaped like a scientific formula.