Creepy, wierd, disgusting, immoral...the list of discriptive words for this situation could go on and on forever! I'll try and explain the back history, please hang in there!!

FDH was married to BM (We'll call her Moo). FDH's sister (We'll call her Fabric) was married to (We'll call him jerkface). So 2 different married couples related through a brother and sister. About 3 years ago ,while all parties were still married to respective partners, Moo and Jerkface had an affair. They slept together on and off for a couple of months. FDH didn't find out about this until after the divorce, and he didn't tell Fabric (SIL) until last winter. Needless to say, the entire family was disgusted and torn apart; however, both marriages had already ended in divorce so besides hurt feelings nothing really changed.

Jerkface is a horrible father, he does not pay any CS, meth addict, has kids lie about stbSM to their BM(Fabric), and on and on. Well FDH and I had spoken to Moo a few months ago about SD5 related stuff, and filled her in on JerkFace's new drug addiction. (Don't want him around SD5 obviously) Moo tells us he'd been emailing her but she hasn't and won't respond to him, that that part of her life is over.

Now on to yesterday...we go to drop off SD5 to Moo. As we're hugging and saying our goodbyes, SD5 asks her BM (Moo) what they are doing today. And Moo says "We are going to BigSplash (a waterpark) with JerkFace and your cousins." OMG!! WTF?! Why are these two hanging out again, and now including the children?! I really don't want to have to explain to SD5 that her cousins are now her step-sibs. EEEEEWWWWW!!!