Hi all!

My partner and I are in an open relationship. He’s recently been seeing someone else and really likes her. I met her at a party and we both had instant chemistry. The three of us hooked up and now only hook up in a threesome environment (her and my partner do not really hook up solo anymore, but i wouldn’t mind if they did... it's just the way things pan out)

My partner and I are also interested in bringing her into the relationship on a romantic level. She has previously expressed interest in such, so yay! But now I’m assuming the two of us (me and her) and the two of them (my partner and her) would begin hooking up in pairs as opposed to threesomes. How do we switch back to this? Is there anything we should know or do? Wanna be respectful of everyone involved. THANK YOU!