Hmmmm...so this couple owns the resteraunt eh. I used to wait tables for a couple like that on a boat. They were both alcoholics he was the cook she ran things and tended bar. She wasn't a lesbian or anything...just one of those handsy wine drinkers. You know...red wine and adult atmospheric type place it's to be expected really in some joints... I mean...there are those outgoing swingy type people who retire and just live it up. My suggestion to you Lilly is this:
If you feel that you are being harrassed and don't like it... obviously you should...find a new job.
I really don't understand why anyone would want to continue to work anywhere that made them uncomfortable. Especially a resteraunt job I mean...they come a dime a dozen don't they. Why would you want to work for these people anymore anyway. If it really bothers you...leave. Problem solved.