My parents remarried and I started living with my step sister, but I couldn't help but be bothered by her habit... I warned her but she wouldn't listen, so we ended up fighting every day... I got annoyed and thought, "If touching her like that makes you calm..." so I started playing with my step sister's pussy, and the stains started to spread and she got super wet! I got carried away and put my erect cock against her, and she went into slut mode and started devouring my erect cock...