When you open the Romance tab in the social pie menu, the Woohoo interaction is available (regardless of relationship) with a green thumb next to it, which makes me believe it was incorrectly tagged as a friendly interaction for the autonomy modification which the club system is, in essence.
It irks me a little as I shouldn't have to fear relations being destroyed just because I selected "Be friendly to everyone" during club gatherings. If I wanted that, I'd have specifically set "Be romantic to everyone" or "Woohoo with everyone".
It's by no means gamebreaking as it can be fixed by banning Woohoo or romance interactions in club gatherings, I just think it was a slight error/oversight.
Edit: Seems others are having a similar issue here: http://forums.thesims.com/en_US/discussion/864053/autonomous-woohoo
I think the green thumb means that it's a positive interaction for the club gathering ? I get it on all stuff I have marked as Dos.
Weird.
Can you post a pic ?
Unfortunately the sim's father just died of old age as I loaded the game, so the option is greyed out.
But as you can see, she hasn't met Malcolm before (Literally just added to club) and changed all the club activites to just friendly interactions with everyone. Both Woohoo and try for baby have appeared without regard to relationships, and because this interaction has appeared with a flag (green thumb) of a good activity in a club gathering, it becomes part of the club member's autonomy.
OK. Now I understand what you are saying.
I'll add it tomorrow. Maybe your first title was the correct term :P
I had to giggle and try it immediately, but I don't get the same result as you do. There is something very strange with your game there. Do you have mods?
That's what I get:
