DP advice needed

Me

Okay so I have this crazy DP fantasy but I’m super uncomfortable to ask my husband for a threesome (I don’t want one - I think it would feel like cheating in front of him - and he wouldn’t want one either). We’ve only even had anal a couple of times. I kinda want him in the 🐱 with maybe a toy in the back? I’ve never done this. Any tips or recommended toys? Also any positions for this?