Life of a 13 year old- Fuck her pussy instead
You could have fucked her ass but the feeling of Rachel's pussy around your dick again was much more tempting.
Breaking the kiss, you said, "Sorry sis but I want that cock sleeve of a pussy around my dick again." With that, you spread her legs open and speared her in one go.
"OH GOD!" She moaned in pleasure and you felt her cum just from having you inside her once more. You gave her no time to rest though and kept ramming your dick into her womb. Rachel wasn't as tight as she was before but she felt no less better, and your sister seemed to enjoy it from the moans and gasps were any hint or how her pussy kept cumming with every odd thrust.
You grabbed her hips, using them to pull yourself even deeper while you kept pounding your fuck toy. Soon you were sandwiching her against the wall and you, leaving her with no room to even move much. Not that she minded of course.
Finally you felt the urge to cum and let loose, flooding her womb with your jizz again while Rachel came from her own organism before suddenly going limp on your cock.
You pulled your dick out of her and slowly laid her down on the shower floor which was cover with your and Rachel's juices. She looked positively out of it, eyes blank of any expression with a dazed smile on her face.
"More...Again...Please Alex." She mumbled.
Hmm...Maybe you can take advantage of this to avoid a day of classes or you could go to school.