What should I say to my sister next time she pulls this crap?

your sister has an inferiority complex and needs to put you down to make herself feel better, don't worry about it just tell her we will see where you both are in life in ten years.....also make a point now to tell her if she remains to be promiscuous that you refuse to babysit you will be really busy.....maybe you do need to do more for yourself???? don't hang out and watch her come and go ! find something to do,you will be distracted and forget what she's doing...picture to guy!!! ridiculous, guys would do a cantaloupe in a pinch, ha, ha, especially at her age! that just shows them she's available, she's not special she is merely creating free for these guys and it is dangerous because some won't stand for being teased and we hear of date all the time... to thine own self be true ...if you can't find something to do get a job or two, then you can wave your money in her face??????mom