Crate Training dog at night

Hi there! First post here.
I got a 15-pound Chihuahua mix 2 months ago, and things are going pretty well. She struggles a little bit with separation anxiety – scratching at closed doors if I'm in the room, and she used to cry and panic in her kennel. I have retrained her by giving her dinner in her kennel and treats every time she goes in. Now she is fairly confident in her kennel!

The issue now is that she sleeps with me at night. I love this, but my partner is not a fan of the dog in the bed. I want to learn how to crate train her at night when my partner is staying over, but still permit her to sleep with me on most of the nights. Does this sound feasible? How would I go about this training?