you decide to finsh your self off thinking of your sisters cock

As you hear the shower turn on,you look down at your dick hard and leaking.You can't help thinking of your sisters cock,just the thought of it makes your cock throb.You start stroking it thinking about Carrie sucking your sister cock,and can't help but thinking about how it would taste.

That thought made a bolt of pleasure run through you,your hard aching cock throbs at the thought of yourself tasting your own sisters big cock.You speed up your stroking imagining you joining Carrie in sucking off your sisters cock. You can't help yourself your sister and her huge cock turn you on,just like it seems to do to Carrie.Your cock starts erupting at the thoughts of you sucking off your sister,but despite your orgasm feeling so intense your cock doesn't release a lot of cum.

As you look up from your orgasm,you see Carrie standing there grinning.