In my experience you can't convince people who don't want to eat fatty meats to eat them. You can't convince people who think grains are god's gift to health not to eat them. You are going to have to simply do the best you can. Make sure the kids and husband get the healthiest grain-rich foods possible. Draw the line at outright junk food.
Meanwhile, make a separate version of dinner for yourself. When I make spaghetti sauce, mine goes on a sweet potato or on top of a hamburger patty and his goes on top of pasta. When we have Indian food I take a little bit of lentils and rice and as much of the chicken tikka as I possibly can get away with. I'll make myself a nice rare grass-fed steak and serve him Trader Joe's frozen tamales. He's actually happy about that (need that boggle smiley here). When we have burritos I put mine in a bowl without the tortilla. If anything, the burrito bowls have kinda opened the door to grain-free dinners. I can serve burrito bowls any time and he doesn't mind if there's no tortilla.
Female, 5'3", 48, Starting weight: 163lbs. Current weight: 135.
Starting bench press: 30lbs. Current bench press: 75lbs.