BF A woman wants to have Your children.

Sounds about right. It even works after the kids grow up and move out.

I feel my main importance to BB is to help her with the dogs or be around so she can be the pets parent while I support her.

If you want to settle down, rest, and be done, then there is no shared goal or pyschological 'baby' for you and your W to work together on.

Shared goal?????? Yes there are some shared goals but many that are not shared or even appreciated.

Lou