Karen called the police on me for teaching my foster son to drive

So my foster son just got his driver's permit. We were practicing driver around the neighborhood. Now I had practiced driving before with my biological son and it has never been a problem. This neighbor has seen me practice driving with my biological son and has even waved at us. I was practicing with my foster son in the same exact car. The only difference? My foster son is black, my biological son is white. So we are just minding our business driving around the neighborhood and I kept trying to teach him how to hill park across from that Karen neighbors house. He kept messing up so we kept trying to do it. I see her staring at us and giving us such a dirty look. Mainly my foster son. I was confused because she has never given me a dirty look before. 15 minutes later (he was not getting hill parking down) a police car stops by us while we are trying again at the hill park. Karen is watching the whole thing with a damn smirk on our face. This officer came at us so aggressive asking what we were doing and I said I was teaching him to drive. The cop looks at me and goes "Ma'am are you okay?" I said yes. Then he fucking says "Are you in this car against your will?" Because apparently a 5'7 15 year old teenager can put my 6'4 ass in a car against my will. I said what kind of question is that and he looks at my foster son and demands his permit. He snatches it from him! After looking at it and running it or whatever he says I need to take him home because he's making people uncomfortable. I tell him he's 15 with a permit, I'm over 21 with a license. I am allowed to teach him how to drive and I even said how I taught my son to drive. Well he then threatens to arrest us both to jail so I just tell my foster son so switch seats and I drive us home. I was talking to my son about it so my son took the car. This Karen is extremely religious, always going to church and talking to people about God. He drove by her house for an hour blasting Heavy metal music. Was that immature? Yes. Am I punishing him for it? No. Funny thing is she never called the police on him. She just came by my house and left a note asking my son not to blast devil music by her house. Fuck you Karen!