Do you think it is appropriate for a 40 year old married woman with kids to wear in public short pants with her butt cheeks hanging out?

My friend dresses like this but i think it looks trashy. I do not want to say anthing but at the same time I feel like I should. Yes she is slim and toned but I just think it is inappropriate. I would not even feel comfortable if my teen daughter dressed like that. What are your thoughts?