My ex-husband is paying for child care so I can babysit for a living?

Writing this I’m distraught, sad, and disgusted. My husband wanted this divorce after I did everything he wanted for 3 years. I am left to find a job and babysitting seems to be flexible enough with kids and graduate school. My husband decided that he will let his parents pay for extended day at school on the days I have them just so I can BABYSIT FOR A LIVING and not be with our own kids. I’m so torn up about this. Long story short, idk how this awful human ended up the way he did but I feel so sad. I feel sad watching and bonding with other children when mine are wondering when I pick them up from school. When I’ll be there. When the next day they get to see me. Is there anyway around this?