the reason i know that she'd have invited me if i wanted to is that she tried and i said no. so, she just went ahead without me, and expected me to sit at home and wait for her to come back. which i of course just couldn't handle.
and, she kept trying after we broke up, too.
she seemed very interested in having a threesome that involved me and a straight male; i would have rather thrown myself out the window into oncoming traffic than reduce myself to some kind of dirty ape, like that.