falcification of marriage

Gung partner ko po kc ay kinasal la dec. 19,2008 pero nghiwalay din sila nung girl nung nov. 1,2009 ,may baby sila, we met that time so we liked each other and lived together and ako ung tumayo nanay nung anak ng partner ko , 2014 ngkaroon nrin kme ng baby , and we're planning na magpakasal, so as I investigate na ung wife ng partner ko adopted pla since 7y/o plang sya,pero nung pinkasalan nya ung partner ko ang ginamit nya identification ung original , hindi ung legally adopted name nya , VALID po ba un? Dba pohindi naman ? Kc bawal gumamit ng dalawang katauhan?thanks po , sana masagot nyo po tanong ko kc gusto ko maikasal kme ng partner ko:-)