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