My DS has a toddler with his now XP. They were living together in a house for which I had provided the deposit and first month's rent; I also bought a sofa for them, and a few other bits and pieces. They have now split, mostly because they're just too young - DS is only 20, his ex 21.
He moved back in with me and has had his DS here two or three nights a week since the split; there's no set pattern to which nights because he works ever-changing shifts, so it's been to suit both parents. We have plenty of space, and my DGS has his own room and lots of toys.
Ex is now moving out of that house and into a council place, so I asked that she return the deposit to me when she gets it back. I also asked that, as the sofa was bought for them, not her, she pay back the cost of that too. DS has been giving her five times more maintenance (£25 pw rather than £5, he only has a pt job) than he has to, so I suggested that he give the excess £20 to me rather than to her, to pay off the sofa. She's not working and is supported by benefits.
She has gone ballistic and summoned DS to tell him that he'll never see his DS again. She's refusing to take his or my calls, ignores texts and has defriended my entire family on FB. She has previously refused mediation.
So it looks like we have to go down the legal route. DS is named as the child's father and would like to go for 50/50 residency. How likely is he to get this, and what is his first move?