Insecure Stepsister Gets Some Reassurance

My adolescent stepsister recently turned into an adult and is a bit unsure of herself. She inquires if she should get a breast enhancement surgery while allowing me to touch her petite breasts. quite unusual! Afterwards, she is cleansing herself and I find myself irresistibly peeping at her. She catches me in the act and persuades me to assist her.
We move to the bedroom and I indulge in caressing her soft buttocks - we both understand this is not right, but the arousal is intense! I engage in intimate activities with stepsister's youthful vagina and ejaculate all over it.