When he stepped into our bedroom he heard his mother saying to our son "come on darling, come to the bathroom with grandma". She took him into the bathroom (which incidentally is the size of your average closet - toilet and hand basin in a tiny space) and locked her and him inside.
The moment DH heard this he charged downstairs and opened the door and pulled our son out of the room. And went completely beserk at her. she is a woman who has no idea about healthy boundaries and appropriate vs inappropriate behaviour.
I am totally confused and somewhat appalled at my MIL's conduct. My husband had said he would only be a minute. While I don't think my MIL would touch my son inappropriately, the fact that she purposely pulled him into a confined space and more or less indecently exposed herself to him has my alarm levels off the charts.
I now am not at all comfortable leaving him with her unsupervised.
I really would appreciate some thoughts and advice. I'm not sure whether this is my maternal nature over-reacting or not.