Would I be able to keep her ually interested or just move on?

She likes 3 sum's but I'm not into the Idea of sharing her with other guys, I know woman like the idea of having two men because it shows there dominate and what one man can do another man can't, for example I can't show PDA very well but i have a good sense of humor and personality, this other guy could be terrible at humor and suck in personality but be all out there willing to do anything and I respect her needs and shes only 15.. I figure she might have daddy issues but than again all woman like the idea of a perfect man but the fact shes 15 is scary knowing shes willing to have with anyone as long as they don't have a STD & wear a condom.. she said so herself but shes a virgin shes not playing games by the way..