At the end of the day, I bet even your mother is happily aware that he is a grown man and has likely been jerking it since before he met her.
She couldn't possibly have a problem with something practically all guys do.
Especially provided most guys now days just own up to doing it.
Chances are, she already knows.
[EDIT]:
As a side note, if all he was looking at was girls with their shirts off, the least you could do is tell him to get some more interesting material... I mean jeez...
She couldn't possibly have a problem with something practically all guys do.
Especially provided most guys now days just own up to doing it.
Chances are, she already knows.
[EDIT]:
As a side note, if all he was looking at was girls with their shirts off, the least you could do is tell him to get some more interesting material... I mean jeez...