It was the cock squeezing that did it. Emily would remember that from now on. Scarlett was being such a meanie keeping it all to herself up until that point. Once Emily had squeezed their cocks together mind, she was instantly turned on and instantly pushing herself on Emily - which was what Em wanted all along anyway. In a second she had a mouthful of warm cum and her sisters tongue trying to slither its way down her throat. Emily wasn't going to have any of that, but she didn't mind a little bit more tongue jousting now she had all the warm cum in her mouth. She could be really mean, she presumed, and swallow it all. Then what would they do? Well, if they wanted any more they could.....<br/><br/>"Mmmmmmmnnnnnnn!" Scarlett had found something for one of her hands to do just like Emily had. Em squeezed the cocks together again. Someone was still leaking a little bit of cum by the feel of it - or it was more pre-cum. She couldn't look down. She was still being snogged.<br/><br/>"Mmmmmmm!" she mewed into Scarlett's mouth again as her sister started to squeeze and kneed and massage her boob. Things were going so well until the damn girl pinched it. Hard.<br/><br/>"Owwwww!" Emily mewed, immediately swallowing the mouthful of cum in one fell swoop even before she'd realized she'd done it. She broke the kiss and looked hard at her sister.<br/><br/>"Be<strong>gentle</strong>sis.... It feels nice but not too hard OK?" Then she was hit with the realization that there was no more cum. "Ah poo, I wanted to keep it in my mouth a bit longer too." Well, she still had two cocks in her hand and there was an easy solution to things.<br/><br/>"You want to play more with my boobs?" she asked her sister. "Then be gentle with them, OK." She loosened her hand and her cock sprang free of her grip. She didn't let go of Scarlett's though. She started to stroke it up and down in her fist.<strong>Gently.....</strong><br/><br/>"Have you done this with boys yet?" she asked her sister a moment later. "I mean, played with their bits and bobs and stuff. I haven't yet." She'd wanted to but hadn't so far. Their mother was very strict that they not mess around with boys below the waist until they were sixteen. Now they were both way over that line but they'd still not done it. Emily was always tentative about new things so she knew why she hadn't she wanted to know about Scarlett though.