Here's an interesting on for you. I have an... odd... neighbor. We'll call her Diana.
Diana used to live in my house. She let her kids get away with a lot. I'm talking Pentagrams and bad graffiti on the ceiling, Silver-Glitter spray paint on dark purple walls, and windows busted out (STILL cleaning up the glass in my front yard from it...). Her 15 year old son is routinely out at midnight or 1 in the morning skateboarding. They had 4 dogs and 3 cats that resulted in the carpet having to be replaced and my back porch still smelling to high heaven whenever it gets hot out (I have tried *everything*. Suggestions please???)
Diana moved to the house next door in December. My mom (who lives in the house behind mine) asked her why one day and she said it was because she got a divorce in November because her husband was abusive. Strange reason to move one house over but whatever floats your boat. A week later, a man started showing up every other weekend. After a few weekends of this, my mom (the nosy neighbor ) asked who he was. "Oh, that's my new husband! We met online. He's a counselor in "Different state"." Uh-huh... and he's only here every other weekend? "Yup, some people have every other weekend with their kids, I have every other weekend with my husband."

Hmmm... Interesting. Her XH takes the kids every other weekend (I know that for a fact because I actually get to sleep without hearing "clunk clunk clunk" from skateboard wheels on the sidewalk) and her new husband comes to visit her. I think that man has probably the best step parent arrangement possible