Because his first love is her university friend who not only was in love with her ex-husband, but is also the…
No, it's about her not being able to accept that she lost. She wanted Siam, she took Siam, but she never really had him, because Inn already had him. She wasn't Inn's friend. If she was, she wouldn't have taken Siam away from him. Even if you think that she didn't know that they loved each other, she must have known it. If you are a good friend, you know what your friend feels even if they don't know it themself. And wanting to win over your son's happiness is just sick. It was all about her. It was never about Wang or Siam or Inn.
What a selfish bitch. I'm a single mother of a gay son and I tried to imagine what her reasons were but I can't find any. I even tried to imagine what I would have felt if my son wanted to be with my ex-husbands new wife, but all I could think of was, that I would be good with everything that would make my son happy. His happiness is my happiness, nothing else. Maybe it's a cultural thing, but she must know, that he will fall in love with a man again. Why not let him be with his first love?
So you have a problem with a kissing scene for a minor but not with him playing in a horror movie like Pee Nak when he was just 15?