just be yourself and show you love there son and your in. My three sons brought home a true veraty pack we are Hispanic and my dougherters in law are one german one Korean and one black I love them all they are beautfuel wonderful caring women and they make my sons very happy what more can a parent want. good luck to you and your boyfrind.
Be real and polite don't be overly talkative but don't be to shy to say nothing. Offer help Mexican family's are tight but open to new people who can fit in with them I know some Mexicans and in time iv met the entire family and got along with almost all of them usually end up likeing the parents more than anybody else just keep it real