In this case Mallards
Yep, those little birds that you see out on the pond going quack are one of the nastiest creatures in the animal kingdom. They're one of the few bird species capable of penetrative sex without consent and they're known for their tendency to commit gang rape.
Since the females don't want to have eggs by any old rapist, they've evolved counter measures.
They discovered that the longer and more elaborate the male member, the longer and more elaborate its female recipient was.
Some vaginas had spiral channels that would impede sex by twisting in the opposite direction to that of the male phallus. Others had as many as eight cul-de-sac pouches en route, that could prevent fertilisation by capturing unwelcome sperm. Moreover, these features were only found in species renowned for forced sex. All other species had simple male and female genitalia.
“These structures are wonderfully devious, sending sperm down the wrong road or impeding penetration,” says Birkhead.
He says that the features demonstrate an evolutionary “arms race” in which control over reproduction alternates between the sexes. If the male develops a longer, more elaborate phallus to force copulation, females wrest back control by developing features to thwart males who rape.
This is a passive or semi-active preventative measure though, you're seeking violent counter measures that would affect the ability of the species as a whole to reproduce. As such you need to create a situation where, should non-consensual sex occur, it has a similar or greater detrimental effect on the reproduction of the species as a whole.