Due to my parents' remarriage, I suddenly started living with my younger sister from today. At first, I only thought she was cute and a bit bratty, but then she started picking on me, the weak brother… 'Hey hey, big brother! Want me to give you a morning nipple tweak?' My sister just loves my nipples... She keeps playing with them non-stop, making me lose control. Since there's no helping it, I went at it like crazy for three days straight.
