Yes, a little

Jack doesn't stop his hand, he hits you again and again wherever he likes. It hurts just as yesterday, but somehow it is not as bad. It is still pretty bad and river of tears flows down your face, but you are not in agony like yesterday. It seems that your attempts to get used to it were at least partially successful.

"Turning you into my personal punching bag was a great idea" says your brother cheerfully "revenge is really sweet. You are even better than punching back, I can't fuck punching bag."

But he can fuck you, so he does that and he doesn't stop beating you, laughing and degrading you. You feel shame and pain, but you are also determined. You'll get this grade. And then he'll pay for what he did. Thankfully he still has a little idea how to fuck a woman so quite quickly he cums inside you with a loud laughter. Your whole body is covered in red marks and bruises.

"Than you for a great time, sis" he says when he finally allows you to leave.