I did it when my marriage broke up years ago and it worked well I think for everyone.
Mum and I had an arrangement as far as babysitting was concerned and we both had our own social life and my dad was the father that was lacking in my son's life .
It worked out well for us, from who did the cooking, washing, cleaning etc, so can see no reason why it couldn't for you whether you use it as a breathing space or a permanent arrangement.
Engagement Party and then Hen Party


but we made it through 6 months and there were sighs of relief all round when we were once more in our own domains.