Something I've noticed that I haven't heard talked about before. HBs (especially if sober) like to get naked at the same time.

Unbutton your shirt before playing with the tits under hers. Take off your shirt before hers, if she asks why you're taking off her shirt "it has to be fair" with a smile. Play with her pussy over her pants, put her hand on your cock over yours. Ditto with going underneath the pants, then underneath the undies. Same with taking clothes off. If you're taking clothes off as well, she won't feel like a whore with some fully dressed random staring at her.