My guess is this mess is as follows, and in fact, I actually know this family:
You have a couple, who has some kids together. Wife's best friend moves in with them, gets knocked up by the husband. First wife moves out, goes on welfare, and the state establishes a support order against dad.
After divorce, first wife moves back in because they are, after all, all friends..and all their kids are brothers and sisters. Then wife and friend decide they're a couple, and dad moves out. Another order is established, this time for the second wife's kid with him.
Then child welfare steps in for a while, yanks the kids, and they all mill around for a while in different conglomerations.
Then the two women decide they're going to portray themselves as *partners* but one gets knocked up by ex, so they determine that they will call him a *sperm donor* and raise the kid themselves.
They're on welfare of course, throughout all this...so once the baby is born and they name the *sperm donor*....who just happens to have other kids with these women that he is also supposed to pay child support on, and the state establishes an order against him.
He decides he wants to be a *co-parent* and they bounce in and out of his house for a while....
Until he decides he shouldn't have to pay child support for the last kid, since they're no longer giving him blow jobs, and files to have the order terminated.
At which time he probably also decides to claim he's not the sperm donor, after all, and a paternity test is done...which either eliminates him as the sperm donor (but the state won't care because either his name is on the birth certificate, or he has acknowledged the child as his own at some point) or establishes him as the sperm donor, in which case the state still is going to pursue child support.
Not that it matters. He won't ever pay jack.
^^^^^true story. My clients. Jolly crew.