Put that house in the name of a trust for the kids, not the mom. She doesn't need to sell that and take the profits - let that go to the kids in the future. Plus if she screws up you (as Trustee) have the right to boot her out.At the very least I'm putting money into a fund with the children. I would agree to buying the mom a home but I would need to see if she was working and all that. Also it wouldn't be a large home, just something that is stable and nice place for the kids to grow up in.