as someone else said.

What is the measure of your son getting better?

What is the timeline?

What if it takes your son 6 months or 6 yrs?

Is that something your H or you would want to do.

So when he does get better then what do you do?

Separate again and put your poor son through the same scenario all over again.

A lot to consider here.

Does it give you a better chance to save your M?

I believe it does

BUT

At what cost

BITS