Hi princessches,
this is a differcult one i did the same thing 15yrs ago, my farther has since past away. Like yourself i was the good sermaritine, but the rest of the family saw other wise when it came to hand the house over to me. it was contested, and unfourtuntly, i lost. If the house is still in his name they can take a portion of the value to pay for his keep. wrong i know , it happens. do the right thing and make a mends, sounds like you are a very caring person, and sometimes we have to bite our tongues and do whats best.
i hope this helps . good luck and best wishe's