Moms, my problem is my mil.

Whn my son was a baby she had done a few things like giving him a knife in hand for few mins n leaving him sitting on kitchen platfrm which is almost 3-4ft hight n also given him oily masala chivda when he was just 9months old.
Due to which i dont trust her. And my son also doesnt be with her but whenever he is with her she keeps on kissing him n forcefully holding n hugging him even though many times my son refuses still.

My husbamd is a mummas boy so he wont tell her anything. But im not comfortable in she kissing hugging him everytime.

What shluld i do plz help