in law rants

So my husbands family hates me. Not all of his family (his sisters and brothers and nieces and nephews love me) just a good few of them. Well anyways we lived in Texas and moved to NJ due to his  infidelity. I chose to forgive him and work things out in our marriage and now we are 100xs better then we ever were.... OK now back to his cheating his cousins have hated my guts since we have been together (mind you we have been together 7 years married for 2 years). Well one year me and my husband had hit a rocky path and we were doing so great. His family knew about our issues and used that to their full advantage.... his cousin had invited us over to her house thinking it was just a nice gesture and away to be accepted into the family. WRONG! She had her friend there mind you the poor friend was only like 18 at the time and we were well over her age... well anyways back on track. His cousin had a great idea of making her so called friend go after my husband. And she did.... but it was brief Bc my husband knew it was wrong. It was just all text. He then ended it. The girl was going to school back in corpus  where she met her baby dad. She got pregnant from him and moved back to Austin. And started staying at my husbands cousins house Bc she had no where else to go. You guys can only guess what happened next. (So during all of that me and my husband had separated it had only been a few months) His cousin yet again continued to pursue this girl into getting with my husband. And at that time his cousin succeeded. When they started to mess around briefly the girl was already like 4 months pregnant. The little fling they had didn't last long. My husband then realized what he was losing ME. And wanted to work things out in our marriage. So I agreed to fix our marriage. So we packed our bags and moved closer to his sisters in New Jersey. This all happened almost 2 years ago. And just yesterday I got a message request from this girl telling me that his family down in Texas is saying her son looks like my husband... she had gotten a DNA test a few months back to get child support from her baby's father and her son is indeed his child 99.99999% his. I know my husbands family is just making false accusations to try to bring us down yet again. I just don't know what to say to this.