She has always made your dick hard when she wad around. You didn't know how much a bbw could turn you on. Tonight your wife is gone and her sister had a break in at her house, so she is staying the night. She starts by wearing those pj's that are way too tight, her giant tits and belly coming out everywhere. She makes you take your cock out and titty fucks you. You can't help it , you have to fuck this sexy sis. You cum harder than you ever have before.