Why are Ridge and Steffy acting like they've "won"?
He's just going to marry her again once he wakes up. And married or no, it's Eric's house and Eric's company and Eric invited her to live there and work for him. Even if he dies, he might have already altered his will and left a bunch of sh*t to her so she could very well end up getting the house, company, etc anyway.
And where do Ridge and Steffy get off telling her that she isn't family, when biologically they aren't either?