Baby mama drama?

I recently started dating this guy, we get along great and I really like him, he has an almost 3 year old son. He is the cutest child ever, and he loves me just as much as I love him! My job has to do with kids, I go to school to learn about early childhood, I have lots of young family members so long story short, I'm great with kids. I was over at his house for three nights and we had his son for the whole time, it was so fun. My boyfriend works long shifts so I would take care of his child while he would catch up on sleep and all.

My boyfriend and his baby mother talk everyday (🙃🙄😡🙂🤷🏽‍♀️) just to keep each other in the loop about what happens w their son. So yesterday my boyfriend told me that when his son went to his moms house he kept saying my name and he told him mum I "helped him put his big boy shorts on"

She was apparently mad? I'm guessing because she doesn't like the idea of another woman taking care of her son? I've never met her but from this I'm seeing that we will never get along ..I feel like this might cause problems in my relationship because why can't I care for his son too?

Comment your thoughts please. All perspectives welcome 😌