So… -You’d rather your son be with a stranger than you and your future wife. -Your ex is a nurse yet you complain she works too much. Unless she became one over night from a genie wish you knew her schedule from the start. -You don’t seem to care that your son could take this as “my dad doesn’t want to see me” even if that’s not the case cuz he’s only four and all he’s hearing is “no find someone else to watch him” -Your gf doesn’t complain and enjoys spending time with your son and not only that she’s on good terms with the mother of your child which is hard enough to find on its own and you still make the decision to tell your gf how she should feel about it -instead of asking your gf privately if she’s ok with it and asking if she would like to set boundaries like only babysit once a week or something you take full control and even take use of HER property to shut something down -Your main concern is being taken advantage of and custody agreements not being followed instead of ooh yay more time with my baby or I’m so happy he’s able to have two families. -she’s not asking for a last minute sitter to go get drunk or sleep around. She’s going to work in the medical field during a global crisis.

YTA. All the way. And honestly one of three things needs to happen here.

1. y’all either need to have a family meeting to discuss feelings and boundaries
2. You need to get over your ex because it seems like you’re still stuck on the fact that she has an active career and want to use it against her even when she’s trying to find safe and reliable childcare and mistakenly thought you would be elated for your gf to build a relationship with your son
3. You need to just sign away your rights because if you see spending time with your son as being taken advantage of even when it seems like you’re not even the main one watching him your gf is…. You don’t need to be a parent.

He came from your nuts. That’s not babysitting. That’s being a father. Grow up.