Stan wouldn't even be able to kill her. Ivy can physically protect herself from wimps and he has no street connections to get a gun or whatever.
Ivy's preferences should be apparant, but since she got no content that isn't lesbian, we don't even know what she wants. Axel doesn't seem to work because of dating their best friend (and Axel may want a submissive woman only belonging to him), she was interested in Mike but there doesn't seem to be anything even if Lena doesn't fuck him (would be hilarious if Gillian is always cucked, either by Lena or by Ivy). Allegedly her best partner would be Billy (someone we don't even know much), we can likely control Ian to let him or Jeremy get her.