Bugs around it looks like when it comes to these things. If the MC did not sleep with Jess, she shouldn't say that she did, I'll have to see why that happened. Also the Jess/Chris lesbian stuff is based on a bunch of variables... there were choices made on the Patreon route that can set it up... and if her Horny level is high SOME stuff will happen even if she is exclusive. On the exclusive Love style of playthrough, on either route, nothing should happen... and didn't in testing, but there are a lot of variables based on different choices and content, so we might have missed a combination.