Okay so I jut experimented a bit. My Sim, Amethyst has just had twins with her husband (a Townie). She goes back to work, he stays home. This woman comes around and they have a romantic relationship (she is also a townie). I got carried away and they were woohooing when Amethyst came home. Not a blink. Just went and cuddled the babies.
I thought this was odd. So I had them kiss and woohoo again in front of her. Nothing. Amethyst introduced herself. He even asked the other woman to be his girlfriend whilst Amethyst was in the group conversation. Again nothing. However when he then flirted with his wife, the other woman became really sad, and left... What the hell!?!?
Amethyst was in a fairly good mood to start with but even so, I could be happy as larry if I saw my husband cheat i'd be a little peeved!
