What do i do when my 34 year old wife shows too much in public?

I m a married man & have a beautiful wife & a son aged 10. The thing is my wife does not miss an opportunity to reveal here at many occasions like parties. It was ok with me till our child was a kid..but now i think she shouldn't be wearing such outfits.. i have tried to explain her but she says its ok..& having a son doesn't mean she should stop wearing skimpy outfits at times. Most of her western dresses are deep neckline & she has no hestitation in wearing them in front of our son. My son once said her " mom you look damn hot" & " you are the y mommy"...but my wife takes it as a compliment & continues wearing them. i mean is it ok if my son makes such comments . I am worried . please help.