An Interesting Offer

I'm still looking for a LTR with a Mistress, but I have something that might fill the void until I can find Her. I've been chatting with a married woman who would like to dominate me with her husband. Her husband isn't really into the D/s part of it, but he is a bisexual top and would be present at all times. Her offer isn't entirely free. Basically, the way she wants it is that I will be their slave one day a week (Saturdays) and spend the day doing chores and running errands for them. I would be responsible for buying groceries and alcohol for dinner which, of course, I would be responsible for preparing. She does NOT want me eating dinner with them, which I entirely understand. She loves her husband and really doesn't want to get attached to me emotionally.

Anyway, after dinner is over and the kitchen cleaned, then the actual domination session would start. There are many more details but in a nutshell that's the deal.

Do you think I should go for it, or is it better to wait and keep looking until I can find my permanent Mistress?