That is indeed correct. Well... mostly, at least. The main character, Jane, is indeed caught by a group of cheerleaders, it does occur in a shower room, and the two variations of the subsequent scene do very much involve her shagging them. However, the initial group numbers three, not two. Your confusion is nonetheless understandable, given that Jane does, unfortunately, only shag two of said trio.
I do feel compelled to state, as well, that I personally consider it to be one of the steamiest scenes of the game. (Any puns relating to showers and steam is entirely coincidental and unintended.) At least, the 'Jane being dominant' variation, that is. I am not all too fond of the 'Jane being submissive' variation; I feel it is simply a touch too... 'predictable', I suppose. I cannot quite articulate my mild dislike of it.
Hopefully, that shall help settle and ease your apparently quite conflicted memory.
~Liz.