Your sister(s) seem(s) almost neurotic in this aspect. I am 23, and I normally wear make-up - but not everyday. Not if I don't have the time or just don't bother, or if I am spending a day watching movies on Netflix and slacking around, trip to the store the only distraction. I don't always wear it to school or to work. In my opinion, most people don't have a problem with you not wearing make-up and a lot of people don't notice the difference.

Most guys I know think a lot of women wear too much make-up. No offense to Brits, but Brits are the worst (and some Southern European women). All short dresses, high heels and a face so full of chemicals that the skin can barely breathe. In my opinion, having SOME make-up (for instance a bit of foundation/powder and a bit mascara) is the best "compromise" - it doesn't make you stick out in any way, it looks natural, and it makes guys think you're down to earth and full of confidence. It makes you seem like a woman who's not afraid to have fun or be adventurous. A lot of make-up to a lot of guys seems attention-seeking or even desperate. When certain women realize this, they will be much better at attracting good men instead of sleazes who just want to get in their pants.

Since you say your mom and sisters make such a point of it, I am assuming they might be in the "unknowingly wearing too much make-up"-category. So don't listen to them when it comes to make-up. You could try putting on just a little bit, see if you're more comfortable then.