W: FIB, I think it's time we come up with a schedule for sleeping on the bed.
Me: No problem...whatever you want.
W: Why don't we rotate by the week.
This may sound like angry Jeff again, but if she is so upset about it, she should go sleep on the couch, or save her pennies and buy a mattress for the spare room.
As you reminded me, this is her idea, not yours. Yes you filed but that was not your choice. She could have fixed things if she only tried.
I did the same thing when I moved out to "give her space, etc". And then I did not have the balls to move back in when I should have.
So set a boundary: Thou shalt never banish me to the couch.
If she objects toss her a pillow and say "I'm done fighting; your couch is calling".