Guiseppino,
And I have to disagree with your opinion. Where do you get the idea that there is something wrong with his mom?
Seems like you have idea that our cross dressing is the result of some evil or abuse from someone in our past or upbringing. I would think we would be looking for someone to commend for us having our fem side and embracing it.
Perhaps his mom was trying to help him come out to his new mate.
But again, why not wait to see what he has to say about his mom showing the pictures to her.