Almost kicked my Dad out

So, since 2020 he moved in and in 2022, he retired from his job. For the past three years, he constantly being asked to do favours for his ex wife. Babysit her dog while she is away with her husband. Seems harmless, right? No, it isn't. It went on for weeks and weeks. Noticed the draining of his money being poured into the car to fill up to go over to his ex wife to babysit the car. Totalled it up roughly to over £600, and she hasn't paid him or gave him anything as a sign of appreciation. So, i sat him down and gave him a ultimatum... to cease this activity of being used and get on with your own life than being the bench bitch that appears to had his balls neutered after the divorce or be homeless. We argued for a while, till i was making points where he actually listened. Once he said no to her the next time, she started to rear her ugly entitled behavior attitude that I suspected would happen. Anyhow, no calls from her for ..well, six months now. No one uses my family like their personal fucking slave and gets away with it.