During the early weeks of my dd's life, dh would hold dd while I cooked, then he'd eat while I nursed and then I would eat while he held her. We all sat on the couch so we were together, just not at the same time. It gets easier!
My husband does the cooking while I hold the baby. He brings me the plate and I eat standing up at the counter with baby in the sling, or in my recliner using the coffee table. Its not as good as a family dinner around the table, but at least its a cooperative effort! Its easier for us though with just the three of us...with older kids it must be mroe complicated.
If Maria simply MUST be nursed during supper, I try one of two things:
1) If supper is eatable one-handed, I'll nurse her at the table. (She doesn't like nursing in the sling yet.)
2) If nursing at the table is too difficult, I have DH make me a plate and bring it to me in the living room.
I must say, I wish my boobs were big enough to provide head support. How handy that must be!