"Hey little brother! When did it get so big?" My serious big sister, whose hobby is reading, suddenly rolls in and sees her little brother's huge cock slip out after a bath! The sister's head is filled with thoughts of big cocks, and she is aroused by her own desire! She attacks her little brother, and when his big cock knocks on her uterus, she finally awakens to her lust! Her character breaks down and she cums wildly! The big sister is summoned by the big cock... the serious big sister is dead! Most women are weak to a big cock slipping out!