Two and a Half Men Episode 6.04 The Flavin' and the Mavin'

Alan turns to Charlie for a ride to work when his car is in the shop, leading Charlie to meet Alan's attractive receptionist. Charlie pursues the young woman, Melissa, and much to Alan's chagrin she agrees to have drinks with Charlie at the house. Alan insists to Charlie that he back off, as this is the best assistant he's ever had and he doesn't want to complicate things. However, Charlie insists that he's a changed man looking for an honest relationship, and all Alan can do is watch and wait. Of course, after spending a whole weekend together Charlie decides he and Melissa need to slow things down. This destroys Melissa, who takes out her anger on Alan, demanding additional benefits for the work she does for him.