A Step-Brother's Protection

I overheard my stepsister Carolina talking to my stepmom about getting bruised up by some pathetic guy at her college. She didn't tell me or my dad, but I saw enough of the bruise on her thigh when she showed it to my stepmom. Needless to say, I took care of that loser and made sure he wouldn't touch her again. But not before my dad found out about her bruise.... thankfully, my quick thinking saved the day when I came up with an excuse for her on the spot. Between kicking that guys' ass and feeding her excuses, my stepsister seemed to feel like she owed me one. That meant taking out my big meat pole and trying to fit it in her tiny teen mouth, apparently. She had an even bigger struggle as she tried getting it in her tight pussy. But once we got going she seemed to love it, she even let me fuck her boobs a little. I got too excited and was going to cum right in her pussy but my stepsister stops me, taking me in her mouth and extracting every last drop of my cum from my balls. I think we're even now?