Someone Help!!!

So I was not at school Friday and missed a test in one of my classes. So the teacher in that class gave me a note in class saying to meet him after school to makeup the test.Well I came after school and one thing lead to another and we ended up having a full on makeout session. It was 100% consensual and I have no regrets; but he has a wife and two kids. I have been sexually assaulted by a teacher before and this was nothing like that at all. I dont think I want to cross anymore lines than I already have and I dont want things between us to be awkward what should I do???

Btw: I dont think that reporting him is right because it takes two to tango.

Update:

So I went after school today to turn in a huge project. ( It lasted a few minutes at most and there was other kids in the class). He said hi and took my project from me and asked how my day was going. I said great and he smiled and said that's good.I had to go so I told him good night and left.The problem Im having now is I think I have feelings for him.I need some advice on how to deal with this. Has anu relationships like this ever work out for any of you???