she absolutely should not effect that decision but I guess I don't see that happening.

There are issues it seems between daughter and mother
that we are not privvy to (or is it privy)
anyway
it is not in a child's best interest to determine if a couple stays together...
those people staying together for the kids aren't really doing anyone any favors

and

is it really Missingherloves's choice if his wife comes back or not?

the only choice he has is if she wants to come back, will he take her back

I take offense at the LBS rallying cry that you mention jack because I would do anything for my children
as would you
certainly walk through hell and back without question
but part of being a good parent is not giving them more power than they can handle
and
I don't see MHL to be saying that he is giving the adult reigns to a 13 yr old

and

I certainly went through my stage of hating my mother and her stage of not liking me so much either