To echo R2C, my W proposed bird-nesting back in early January.
On the advice of several people in the forum, my L, as well as my mom and uncle, I turned it down categorically. I told her that if she wants out of MR, she could leave at any time.
W is currently threatening to move out around May 2nd; however, because I held firm on the bird-nesting, it bought me an extra three-and-a-half months with my boys under our roof, which to me is absolutely priceless.
