my husband wants to find another girl to eat me out and have me eat her out.

my husband has this new fantasy because every now and then we will watch porn and I will pick out a video with two girls one guy. And my husband now has this new fantasy about finding a girl to come over and eat me out while I eat her out. He does not want to do anything with her he just wants to do a three-way with her but only me and her have the contact. I'm just not sure if I would be able to do that in real life. Yes we talked about it in our fantasies during foreplay but not sure I would be really able to do that in real life. Have you ever done that? Is it weird?