Should I ask someone out at work if they SEEM to be interested?

Anonymous
I’m a TA at a primary school and I work with my dads girlfriend. Another TA works with her too and he’s my age. Super nice guy, he presses my buttons in a playful way, we catch each other looking at one another, he talks about me to the kids and even tells the kids to come tell me things may it be something sweet or a joke. To me it seems like he’s interested but won’t ask me out because we work with my dads girlfriend.
On Friday after work while shopping, my dads girlfriend told me he totally lit up when I went up talking to him about the kids and that she saw something between us but didn’t want to say something
So I’m wondering if I should invite him over for dinner or something just from the way he’s acted around me.

Thoughts?
Should I ask someone out at work if they SEEM to be interested?
5 Opinion