For starters, there is a clear abuse of power here with one party being the senior person at the company suggesting that things will be 'ok' when clearly there was a plan all along to create a situation of asymmetry and dependency, followed up with a lot of very mean and manipulative action.
Besides using the child as leverage against the mother there is a clear - and continuous - act in the self interest of the dominant party, more wealthy, still employed and willing to use every dirty tactic in the book and a couple I'd never even seen before against the other.
Utterly revolting and not simply 'two consenting adults in an adult relationship full of bad choices'. That's victim blaming at its worst.