Need help with issue with my father. Last month, it came out that my dad may possibly have another child.?

This would not be surprising. He already has three illegitimate children that we know about. I did not want to be involved in another family drama. So, I let it be known to him via email that I did not want to discuss the topic. My stepmom blasted me calling me selfish and disloyal. My dad said he agreed with her and could not understand why I would believe the story. After they went around trying to enlist other family members against me, I sent them another email stating that I demanded an apology for their behavior. I feel I did nothing wrong. Meanwhile, my dad has decided to use another tactic to illicit a response out of me. A couple of months ago when I was short on rent, I borrowed money from him to cover it. We set up an arrangement for me to pay him back and it was all simple. Well, now he is calling my mother (his ex-wife), my stepdad, my little brother, and my sister telling them that I am in the this huge financial mess and that he is wanting them to tell him