Here is the full list of all 19 Frisky Business (EU) trophies - there are 17 bronze and 2 silver.
Collect every piece of evidence
Get the true ending
Be nice to Charlie
Be nice to Charlie and Samantha
Get it on with Claire
Get it on with Tiffany
Threesome with Balbina and Serena
Get it on with all the girls
Complete a play through with no sexy times
Be a Jerk to Sam and Charlie
Get all possible endings
Get it on with Jenny X4
Have Threesome with Jenny and Gertrude
No Wrong Answers in Trivia
Dated Jenny
Dated Lucy
Dated Balbina
Piss off Balbina
Peep through all the girls windows