Back at Alex's house Nick was surprised by his father coming up behind him and pinching his butt. He spun around and saw his grinning father leaning in for a kiss. Nick backed up but hit a wall and then felt his father's lips meet his.
Lisa in her son's body came into the kitchen and saw her son making out with her husband and walked back out into the living room disgusted by what a pervert her son had turned out to be.
A few minutes later Nick walked into the living room and saw his body watching TV and said "I can't do this."
"Do what?" Lisa/Nick asked
"Pretend to be you... it's all too much." said Nick/Lisa
Lisa/Nick's expression changed and said "Okay, so I guess I'll go explain to your father the woman he had sex with last night and the woman he was just kissing is actually his 15 year old son." and then stood up.
Nick responded with "NO! You can't do that!"
"Well then you're going to have to keep pretending to be me." said Lisa/Nick
Nick/Lisa said "But-" but was then cut off by Lisa/Nick saying "Look 'Mom' if you didn't have sex with your father you wouldn't need to pretend to be me, but you did have sex with him so it's either tell him or pretend to be me."
Nick didn't like either option, but then said "I.. I'll keep pretending to be you."
Lisa/Nick gave Nick/Lisa a look like she was disgusted and thought "What a pervert."