(Please see all previous disclaimers)
Predaking, seeing how things were progressing, climbed on top of Lancex and pinned the bot down while Optimus just watched the show for the moment, waiting for his time to join in. Lancex was a little out of sorts at the added wait, but the rubbing and kisses seemed to warm him up and make him feel that things would be okay. He even looked up into the dragon bot's optics and saw desire and lust in them. Predaking roared possessively but spoke passionately, "you have no idea just how much I have wanted this."
Seeing his advantage, Predaking kissed Lancex deeply. Lancex moaned in pure pleasure even as he was shocked at how this was progressing. It was far beyond Lancex's wildest dreams… well, with the exception of one recent dream. And just then, Predaking pushed things a bit further by opening his groin plating area and releasing his spike. Lancex only realized it when he felt the stiff metal against his groin plating. Lancex then realeased his own spike, which Predaking quickly took to rub against his own spike, causing Lancex to moan.
Meanwhile, Optimus was watching, slightly torn about this due to his processor but his spark was winning him over, but eagerly wanting to join thanks to the pleasure wracking his own systems. Optimus had his own spike out and was stroking it as he watched the hot show. Optimus can't wait for his turn, as he watched Predaking kiss and rub Lancex, which Predaking soon stopped. Lancex out a bit of a whine. But then he looked over and saw Optimus. It was strange to see the Prime not only with his battle mask open, but his optics full of lust and desire as well. Lancex wasn't sure what to think other than he didn't want to be left high and dry.
While massaging his own, Optimus rubbed Lancex's spike with what seemed like a well practiced hand. "Oh, Lancex… you have no idea just how much and long I have wanted and desired this" Optimus said, lust clouding his usual demeanor. Lancex gulped at hearing that, but the pleasure felt so good. Lancex was surprised with himself as while he thought he would have preferred to be in charge, submitting to these two powerful bots made him feel even more pleasure go through his needy systems. This felt right.