Unfortunately this happens far too often.
Especially when it comes to your residence. With the housing/homeless epidemic we are currently suffering,
It feels difficult asking someone, especially a family member, to sign a contract. But think of it like this- when you are watching a public speaker, are you scrutinizing their every move? No, but they think you are. Just as you feel everyone is judging you when you're in front of the crowd.
Asking for the legally binding contract is not as difficult as you play out in your head. It's your life. And your family is worth it :)
RE: Broken Promises - Get It In Writing