Here is the full list of all 20 Frisky Business achievements.
Get it on with Jenny X4
Break the 4th Wall
Piss off Balbina
Get it on with all the girls
Collect every piece of evidence
Threesome with Balbina and Serena
Dated Lucy
Get it on with Tiffany
No Wrong Answers in Trivia
Dated Jenny
Be nice to Charlie
Be nice to Charlie and Samantha
Get all possible endings
Get the true ending
Have Threesome with Jenny and Gertrude
Get it on with Claire
Dated Balbina
Be a Jerk to Sam and Charlie
Complete a play through with no sexy times
Peep through all the girls windows