What do you think about me telling an older lady to go swim elsewhere?
Why did you want her to swim elsewhere?
Her age made her stomach look like a big ball
You don't have to like how everybody looks but you cannot tell someone that they can't be around you. You shouldn't judge their appearance on their age either. It will make you look like a bully.
She shouldn't try to show off in a swimsuit if she can't stand younger people seeing her in such a state.
It's wrong to judge someone based on their age or their physical appearance. Doing this makes you seem shallow and vain.