Instead of getting a divorce and having two separate homes the kids rotate through, nesting is a newer concept where the kids remain in the existing family home and the parents take turns staying there. Some parents each get their own new place and rarely some will share one other place that they are never actually in together. Often parents rotate on an every other week schedule, but any schedule that works for the parents is definitely possible.
The idea is that the kids remain safe and sound in the “nest” or family home. Their living arrangements don’t change and they aren’t shuttled around from place to place. It allows the kids to have a more stable environment and familiar surroundings as they adjust to the divorce. The children experience as little disruption as possible and can continue with the same school, same activities, same schedule, and essentially the same life as prior to the divorce. The benefits of that are huge.
Nesting can be quite expensive though. Maintaining the existing family home as well two additional homes is a huge financial burden most families cannot take on. Nesting can also be challenging for the parents. You’re sharing a home with your ex even though you’re never there together. You don’t actually see each other (except for planned meetings or occasionally passing on your way out) yet you’re sharing a kitchen, bathroom, bedroom and living area. All of the conflicts you had about not doing things the same way or disagreeing about how a household should be run will continue.
It can also be difficult to uproot yourself every other week and stay someplace else. Packing clothes, work things, toiletries, medications, and everything else each week can result in some giant mix-ups.
Another challenge is that after divorce, it’s common for the parents to gradually evolve and make some changes about who they are, what they think, and how they live their lives. This is often gradually reflected in parenting styles that can change. If this happens during nesting it can be confusing for kids who may find the parents suddenly are implementing different rules within the same home (Mom says no eating in the family room, but Dad says it’s ok, for example).
I worked with some families who tried nesting and most found that it worked as a short-term transitional method. It wasn’t something they wanted to do long-term, but they found that for a few months to a year after the divorce it was a great way to help their kids adjust and also give themselves time to figure out what to do with the family home and to find other places to live permanently.