Grandma Gave Me Car With Dementia . She Remembers And We Talk About It Daily.. But Still Curious

Legal advice

Hello. So my grandma has diagnosed dementia and lives alone. I've been helping her for the past year. She got her license taken away 2 years ago and recently gave me her vehicle since it's been sitting for 2 years. She signed the title over to me. Turns out my uncle who we don't talk to is also on the title. DMV said they can just add me ti the title in place of my grandma. Per her recent drs appt. She has dementia and it is unsafe for her to live alone. Am I at risk of any legal trouble from accepting her car.. I also have multiple voicemails of her telling me it's mine and she wants me to have it. And asking how the family is enjoying it.. should I be ok if my uncle ever questions it?