Well as long as it's not slutty. I hate when older women try to dress wayyy to young for their age or dress slutty. It's kinda pathetic.
I think one can be sexy at any age. Sexy is less about apparel, and more about confidence. And is often confused with dressing sexually.
a woman should be able to dress sexy at whatever age she is
ShimmerBronze--.
Agree with all above, women should not dress slutty at any age, but should be as sexy as long as they want to be.
as long as someone looks good i guess it's ok, but i picked 50's cause i couldn't see someone my moms age (61), i would be like whoa!!!! joey lawarence-
Never stop working it...as long as you know how to do sexy tastefully and not slutty.
Someone needs to get JennaV on here. What age should you stop wearing your Daughters hollister. 
I agree with JK on this. And being sexy doesn't mean dressing in skimpy clothes. I think a lot of older women are sexy.
I think that as long as a woman feels sexy, she should dress sexy, whether she's 20 or 75.
However, I don't think that dressing sexy should mean dressing slutty. I feel sexiest in a well-fitting pair of jeans, a sleek top, and boots.