She's not interested in them, so she doesn't fugg another guy, she just checks it. Regarding the girl-on-girl, there is still MC in the scene (in the future), I don't know if it is still called sharing, but I think it's just FFM.
If the LI is fucking someone other than MC... it's sharing. That's kinda how it works.
If she wasn't interested she'd never have checked lmao, you've established MC as a cuck to her, depending purely on her whims if she does decide to go and fuck another dick that suits her fancy.
