Boyfriends Dad

So for the past month I've been secretly meeting up with my boyfriends dad who has a major foot fetish he's 48 very good looking one thing led to another. We haven't done anything really sexual he mostly just gets off on sniffing my toes or licking my flip flops or what he likes to call "eating my toe jam". I know it sounds gross but I never had an experience like it before and thought it to be sexy . Even though we technically haven't had sex I still feel like a slut doing this behind my boyfriends back