My stepsister took off her underwear while we were sharing a bed

My sexy brunette stepsister and I decided to share a hotel room during our vacation. While my stepsister and I were on the bed, she took off her panties and bra. Staring at stepsister's naked body gave me a boner. So my stepsister suggested I masturbate while staring at her shaved pussy, but that didn't work. I ended up fucking my stepsister.