Was I wrong to help him?

My best friend is 21 and I'm 19. He has had epilepsy all of his life. His fiancée knows he has epilepsy and we all live together until they can afford a place to move out. Today, she called me screaming and crying because "something terrible happened" so I rushed home from grocery shopping(I was 20 minutes away). My best friend was having a bad seizure. When someone has a seizure they can poop, urinate, or throw up because they are not in control of their bodily functions. My best friend had done all three and his fiancée was disgusted and pissed off because he had done it even though he couldn't control it. She left him soiled in his mess for 20 minutes because she thought it was disgusting and it's not her job because she isn't his mother. She wanted to call his mother so she can clean him up since it's her son. I love my best friend a lot and I would do anything for him. I grabbed some gloves and I cleaned up his vomit, pee, and poop. Then I started to wipe his butt because I didn't want him to get any rashes or infections from not wiping. I also did not want him to be uncomfortable and have him laying there unclean so I gave him a sponge bath just to make sure he was fully clean. His fiancée comes in the room yelling at me that he owes her a new jacket and purse because he threw up and peed on it. Then she starts calling me a bitch and slut because I have no right to clean him and he would have been fine for another 30 minutes until his mother got there. She also said that he could have just done it himself when he woke up. Was I wrong for helping my best friend?