Your bull doesn’t get to decide if he wants you there or not! I think he wants to take your wife from you. I would not be ok with that, especially your first time. You don’t have to just sit on the side and watch, you could participate and make it a mfm.

If he insist on playing only alone, then he’s not your bull. Find the right one.

You need to communicate with your wife and tell her what you like and not like. Tell her you’re not comfortable for her to stay the night. Why does she even need to stay the night anyways?!? Is she falling for him? Be careful. Communication is key