Um ... NO!

If the property is being given as a gift, it should be free and clear of any strings attached to it, and I'd be especially wary of someone (related or not) trying to foist a third party into the living arrangement!

You can stop this manipulation dead in its tracks by simply saying, thank you for offering me such a splendid gift, but I'm not comfortable accepting it!

Sincerely,
Pfrog!