Your big sis just got a new house! She's so excited to swim in her private pool and show it off. Things take a turn when she starts reminiscing about things you've done while living back with mom and dad. She brings up the time she was out by the pool and got a bad sunburn so she has to take her top off. She remembers the story so vividly. As she goes into detail your cock starts getting harder and harder. Then she says it "I want you to stroke for me little brother"! Now you're fully erect and cant do a thing to hide it. You take your cock out and stroke as she tells the story and then she starts jerking you off. You don't last long when she starts licking your cock and sucking just the head. You make a huge mess all over her perfect tits!