Legal Question in Family Law in Texas

You have not provided enough info to answer.

If she is mentally competent, she will handle her own affairs.

If she's married, it's her spouse.

If she is in a coma and single, then it gets complicated.

Someone might need to be appointed to make decisions for her.

Of course, the hospice has to agree to follow the decisions -- you might to deal with their legal counsel -- they often worry about being sued.

You need to meet in person with an estate planning attorney in your county to discuss the situation.

Look on this website & on www.avvo.com for an attorney specializing in probate/wills/estate planning.