Her little sister, who I thought was innocent and had little knowledge about sex, suddenly transformed into a slut! She showed me her panties, begged me for a kiss, and took advantage of the opportunity to get fully erect when I wasn't thinking of her as a woman! When I found out that I hadn't done it raw with my girlfriend... I got on her lap and fucked her raw! I couldn't resist the pleasure of bouncing around innocently and came inside her over and over again!