Okay, for those who are wondering, there's a scene where a mechanic (he's white, since that's apparently relevant) fixes the mom's car and hits on your mom. She casually flirts back, or at the very least just kinda goes a long with it, and then jokes about him hitting on her with the MC. It doesn't lead to anything, and given that the relationship with the mom continues to develop with the MC, nothing probably ever will.
If anyone here has ever had a girlfriend irl, you've probably been in some kind of situation like this. Someone tries hitting on your girl while you're off getting drinks or whatever, and when you come back, your girl tells you about it, with a slight roll of the eyes and that's it. Like, it's not a big deal, unless you're very insecure.