Big caveat that I know nothing about any of this, but do think you need to protect yourself financially. I don't think you want to be in a position where you don't have access to $$ or are reliant upon him to give you funds for regular needs unless it is mandated externally, as if he gets angry or whatever and cuts you off you are in a really bad position.
I'm going to guess he isn't going to happily hand you the key back. When my H was in his fantasy S/D mode, having access to the house was a big part of it and I know for him paying half the rent for "storage" still felt like he had a right to a key and walking in whenever he wanted.
Do you have accounts of your own? Joint savings accounts? Perhaps another suggestion (should he bring it up) is to split his bank account and create one in your name with half the funds, and in addition to have some portion of his salary direct deposited into your account whenever he is paid. That way he has to take an extra step to cut you off and you don't need to ask him for anything, and you have the savings reserve to back you up.
I agree with WF though that the likelihood of him following through on this isn't all that big, and if you're in a better spot where you are right now, no need to push it or help it along.
Also, you know where I stand on his laundry!!
M
Me (46) H (42) M:14 T:18, D9 & D11 4/19 - 12/19: series of escalating BDs 9/20 - present: R and piecing
