Matt do you want children?
If you don't it would still be the same crap from your parents whether you are gay or straight!
I have 6 kids & 8 grandkids, I love them all and do you know what I want for them? I want for them to be happy!
If they are happy with or without kids, I am happy!
I have no right to expect a darn thing out of any of my children.
Next time your parents start talking in a manner that is hurtful either about you being gay, or the family name not being carried on or the like calmly ask them what is really important to them, you being happy or them being happy? Ask your mom what makes her happier, you being happy, or laying a guilt trip on you?
It may not be a bad idea to see if you all could get together for family group therapy.
Matt it is sad to say, but many parents lay guilt trips on thier kids for all kinds of things.