If your brother is really looking for a serious relationship, tell him to cut that bitch off. Even if her body count wasn't necessarily so high and it was only like 2-3 people, the bodies still make a difference. I've gone for some girls who ****ed some dirty ass guys that have pretty much caught everything known to man. Had I known that to begin with, I would've never gone for the girls in the first place. Plus it feels a lot more reassuring knowing a girl's a virgin, so you don't have to worry about catching anything. AND you get to be the first one to set the bar

Plus if one thing was lied about, one can only imagine what else was a lie.