She may decide she wants to get into chickens. Lol, or both! I will assume your babies will be at least six weeks old. I am unfamiliar with the weather in your area, so it is hard for me to advise as to how you keep them during the winter. As a rule, by the time kits are six weeks old, they are ready to be self sufficient; which means, a cage to themselves with a board to sit on. Rabbits have fur coats, so winter weather does not bother them much. As long as they are dry, with no drafts on them, they should be fine. If you are worried about cold, then a nest box of some sort can be added.. Shavings with a nice layer of straw to cuddle in. They also love to eat straw, which is fine. The more fiber, the better. They also gnaw on their sitting boards..that too, is fine. These days, I think they sell plastic sitting boards, which are more sanitary, and easier to clean. Just try to avoid placing sitting boards or nests in the corner they choose to use for their bathroom. Rabbits tend to go back to the same place to do their business when confined. Also, a rabbit is far more likely to die during the heat of summer. They can't take those fur coats off. So shade them well.
Personally, I would not house the babies together. A female Is capable of producing offspring when they are six months old. Sometimes sooner. And that is, really, too young. You should wait until they are closer to a year old. By putting them in seprate cages you are avoiding problems down the road. Bucks also spray when they are mature, so if they are side by side, you will want to put a board between the cages. That way the doe doesn't have to put up with that. I kept my bucks in a seprate aisle in my rabbitry. And I kept boards between my bucks, too. They will fight through the wire otherwise.
If you decide to breed for meat, I would suggest one buck, and two unrelated does. That way, one doe can rest while the other is having a litter. They are fully capable of producing anywhere from 4 to 10 kits every thirty days. The doe is ready to breed again as soon as she kindles. Lol another reason to keep them seprate. They breed like rabbits! In the wild she will kick the kits out of the nest at thirty days, and pop out another litter within a day or two.