Now, I must admit. You threw Big Mama for a loop. I started this site to help y'all with personal problems, not cooking problems. But, I must say I am glad to oblige.

1. Get 4-5 bunches of greens
2. Wash them good. Make sure there is no sand left on them.
3. Check them for brown spots or old pieces.
4. Take off the stems.
5. Stack and roll them up, like you would a burrito
6. Cut them in strips.
7. Get a big pot and fill it, about a third of the way, with water.
8. Add 2 ham hocks, salt, pepper, and a little chicken bouillon
9. Simmer until the meat falls off the bones when you pick at it.
10. Add the greens and cook for about 2hrs.
O.K., onto your visitor.
It seems to me that you are doing a lot to make a good impression already. Any mother should love the effort you put into making her feel special. My advice is to talk to your boyfriend. Don't ask him what his mother is like. He will only tell you how great she is. This is nice, but won't help. Instead try asking him about family traditions and expectations. Do they ask to be excused when they get up from the table? Do they, usually, eat in front of the T.V. ? Are certain conversations considered rude or tacky? These answers should give you a good idea of what to expect. Other than that, honey, just be yourself. You seem like a good catch for any woman's son. If she can't see that, it's her loss.
What do you think she should do? Family let's help!