I was thinking maybe 37 for her if you're good with that large of an age gap for this. And oh, she could definitely have moved in after the divorce, especially if they're close, because she would want to care for him. I told you so situations are always so hard on the party being I told you so, so while she says it about his ex, she'd definitely be sorry he fell so hard for her too.
But also yes, she will younger mom him if he needs it. =)