Mia: This isn't your thing, so don't you dare do it. You two are still in the getting-to-know-you phase as well you should be. You probably don't even know his middle name. Do not perform sex tricks on him that put you in an awkward position or make you uncomfortable. You want connection and intimacy. Work on building that part of your relations, not fulfilling some adolescent gamer sex fantasy.
Steve: Fantasies are not always bad, but this might set a precedent. How about when he's playing you just offer to give him a hand?
Steve: Oh, that is mean and I say that as someone who has a few pounds to lose. Since you are to be married, the witch is going to be around, so take Taylor Swift's advice and shake it off and when she comments about your weight, you return with a sincere compliment about her looks or attire. (Make it sound sincere, anyway.)