My wife and her ex-husband own a house together. My wife lives in the house. I plan to move in and she and I will buy out the ex-husbands equity. He's agreed. We learned the best way to do this is through a cash-out refinance. To begin this process, he is willing to Quit Claim the house to my wife and me. That will allow us to refinance using my income. Question: If the ex-husband quit claims the house to my wife (his ex-wife) and me, does that constitute a gift on his part (since I am not related to him) and would he be liable for a gift tax?