Both of those ideas could be fun to play with while she is first learning how to drink from humans. I could see it being difficult for Devin to watch her charm someone, especially a guy. It could also be fun to play with Avina knowing how intimate feeding is after she experiences it and then turn around and watch Devin. That might bother her too.

I still see Avina having a really hard time dealing with her hunger. I see her going off the deep end with feeding and Devin having to stop her.