I don't really see how it's in embarrassing. Generally during sex you're trapping the air in her v****a... it has to go somewhere. All the girls here that said it hasn't happened to them during sex are lying.
Farting? Hell no.
Queefs happen though. When a guy pulls out and back in sometimes it's kind of inevitable, you're trapping air.It's not embarrassing.
Continue on, if the sex is good enough you shouldn't give a ********.