Angel,
I have spent a good portion of my adult life finding, volunteering, and sometimes organizing/coordinating/setting up social/sports/game events for my child.
Now that he is a little older I've also done a small bit for young ladies that we know.
It's inappropriate for young women and men to be playing sports together like that. Again I encourage you and your sister to sit out, and do not participate.
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that might be immpossible to do, since 15 kids who are all very good friends are getting together every month to spend quality time with one another, it would be a shame to not participate [/quote]
ETA: I think it's great there is an organized social time for the youth.
Be sure there are adult (parent's age not young adult) chaperones there.
What about having a meal or dessert together, singing, doing crafts with the girls like scrapbooking, a service project, chess, checkers, scrabble. Let the young men play sports together and you can do something else with your girlfriends.