I am in the exact same position that you are and I'm not sure how it's going to work out. Both my husband and daughter take up way more than their fair share of space and I currently sleep squished between them. (We have 2 full sized mattresses pushed together, so slightly larger than a king.) I think that my solution for the first few months is going to be to put my husband in the spare room and place the baby between myself and the wall... unless Alice begins to very reliably sleep through the night EVERY night in her own room before then. Currently she comes into our room anytime between 1 a.m. and 7 a.m. ish.