I think that maybe something got lost in translation. The Spanish translation are up to ch 15 so what really happened was...
ヾ(☆▽☆)
Spoilers ahead!!
(づ ̄ ³ ̄)づ
You've been warned!
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that that girl used a kind of aphrodisiac to try and make Jasper bit her because Jasper's mother is against their love. So, they confronted the girl and the girl admitted to being a poor aristocrat and being threatened by Jasper's mother. Then, they make a plan to try the fool the mother by making her think Jasper is now against him and with the girl but it's all a ruse. However, she goes and declares where there are many people around that people has stopped picking on her because she's Jasper's gf while they continued bullying MC and that she's in love with Jasper and asks the MC to break their relationship then feigns being pushed down the stairs and accuses the MC. Jasper doesn't believe her but the social pressure and the plan makes him glare at MC and MC thinks Jasper actually believes her.
Ive already disliked him way before i read the spoiler comments abt jasper biting another omega. Im just rlly curious abt how it ends so i kept reading. But tbh the uke deserve someone better than jasper. Jasper is so immature, hotheaded, and brash and always sticking to the mcs space even if mc doesnt want him sticking around him (Aside from his traits, I also dont like his character design, hes not goodlooking