Just do it. It should remove some of her nastiness. It could escalate it short term (hours/day or two), because she may gain momentum. Just tell her you aren't going to move out, but you are willing to give her the bed so she can get a good night's sleep. Tell her your first construction priority will be making another bedroom. Don't say it's your room or her room, maybe you'll be back together again by then.

You will never exactly know what's going on in her mind.

It's ok to kiss her ass. Just gotta look manly and cool when you do it. \:\)

sg
Love is PATIENT, love is KIND, LOVE never fails / DB since 2001