(This video is a bit cheaper because it's shot on my phone rather than my filming camera!) Your sister overheard you bragging to your friends about your incredible stamina and marathon masturbation sessions, and she thinks you're full of it! She teases you about being such a big liar, but you argue back and insist that you really can last hours! Your sister tells you she won't believe it until she sees it, and suggests that the two of you play a game - you'll start wanking off in front of her, and she'll get her tits out and try and make you lose it and cum! She says that it should be pretty easy for you, as it's not like you'd enjoy looking at your own sister's tits, right? So really her having her boobs out should just help you last even longer! You nervously drop your boxers and start stroking your cock, doing your best to concentrate on not cumming, and your sis begins trying to distract you by playing with her perky breasts and talking teasingly to you... She spits all over her boobs and dirty talks to you about how you're so hard over your own sister, and how she bets you're even thinking about her pussy now! She refuses to let you slow down your stroking, and keeps making you speed up and match her motions. Eventually you can't hold it anymore and you surprise your sister by shooting a huge load of spunk all over her tits! She laughs at how pathetic you did after all your bragging, but at least she does offer to help you keep practicing, so you can get your stamina up and stop having to lie to your friends about how good at lasting you are... TAGS: british, english, redhead, ginger, tattoos, tattooed, solo female, roleplay, dirty talk, posh accent, pov, taboo, bro sis, brother sister, joi, jerk off instructions, jerk off encouragement, tit play, spit on tits, small boobs, small tits, edging, edging game, tit worship