Girls, Is this love or pathological control?

I came to my boyfriend's house this Saturday. And saw a scene between him and his mother that she did not know I saw. They were both standing in an outside sunroom. She had hold of his necktie knot (a full suit is his regular form of attire) and backed against the screen wall.

I heard "not completely honest" with me. She let go when she saw me like white hot iron. I have otherwise seen her dote over him. And there relationship is closer than the vast majority of mother-sons. I don't know what it was about. I am not sure I was the subject. He has a share in her company ownership.
Girls, Is this love or pathological control?
Post Opinion