The Mommy Observation
Sheldon and Howard drop in on Sheldon’s mother Mary, but flee after Sheldon sees her having sex. Sheldon returns, gets into an argument, and is sent to his room. After Howard tells him he once drove away an admirer of his mother, Sheldon apologizes to Mary, saying he will outwardly accept her choice whilst inwardly condemning her hypocrisy in going against her religious beliefs. She forgives him and commends his good Christian attitude. The rest of the gang is roped into a murder mystery dinner arranged by Raj, with Stuart as the corpse. “Traveling” to the future envisioned by Raj, Leonard and Penny broke up because of their successful careers. The pair argue what they would do if one were required to abandon a dream for the other’s success. Stuart says they are the best couple he knows. Penny accidentally reveals being the murderer, ruining Raj’s game. Whatever happens, Leonard suggests they all meet in front of the apartment in 20 years for dinner. In that future, only Stuart shows up.
Title reference: Sheldon accidentally observing his mother’s new love life.