When dealing with your relatives you have to enter the relationship knowing there may be opposition. Your family will test your relationship to see if the two if you are capable of handling how outsiders may view your relationship. Don’t allow negative people to draw you into a debate regarding your culture versus your partners culture. If its simply a matter of having dinner with his/her family just be prepared to withstand any verbal blows. I believe it’s best to leave the residence early rather than stay and add fuel to the fire. I understand some cultures this maybe seen as disrespectful but you have to decide as a couple what is the best action for the two of you moving forward.