Queefing??

Okay so I'm sixteen years old and I have only ever had one sex partner who I am currently still dating. A lot of times when we have sex I queef. most of the time it's when I'm super wet down the (tmi I'm sorry) but my older sister (27) told me queefing only happens when your vaginal is "loose" I know that the vagina is a muscle and it can not necessarily become "loose." Is this a problem for anyone else because it's super embarrassing. He doesn't seem to mind but I would like to prevent it if at all possible. Thanks yall!