Talk:The Collaboration Contamination/@comment-33238217-20171004174333/@comment-28161168-20171022144911

I also think this may be a prelude to an arc for Leonard and Penny to try and conceive a child. This episode plus episode 4 where Beverly is becoming more friendly with Penny and the next episode where Penny has to babysit Halley for Bernadette. Maybe her maternal instincts are beginning to show.