My husband wants me to be intimate with others at his request.

**Summary**: My husband wants me to be open and accepting while allowing him control over my sexual encounters — specifically, who I hook up with and when. I’m 24, and he’s 26; we’ve been married for eight years and have kids together. We've had two threesomes (MFM), with one being enjoyable and the other less so. While I'm open to trying again, my husband’s approach is to spring it on me, which feels like he wants complete control, and that makes me anxious. I prefer to have discussions and boundaries in place, especially since I struggle with anxiety. I want to be more open to the idea, but I also want to communicate my boundaries effectively. I’m looking for advice on navigating this situation and how to express my discomfort when it comes to his demands.