My reserved stepsister seeks my assistance in losing her virginity and experiencing orgasm

My stepsister has always been the shy type, never speaking much or showing any interest in guys. But one day, she finally opened up to me, asking me to be her first and only partner. I was hesitant at first, but after some convincing, I gave in. What followed was an unforgettable experience as I took her virginity and filled her with my cum.