@dragoncena
I would have loved this growing up. Not because I thought my parents were going to get back together, but because as you say OP, it demonstrates that you can all be a united front and that can only be good for children.
I really don't know why people say these situations are confusing, unless Mummy and Daddy are having a snog on these days out it is perfectly comprehend able to a child that they can still be in the same vicinity but not together.
See in my experience, it genuinely
can be upsetting and confusing for a young child.
My DP's ex moved far away and as a result when the children have a birthday party/sports event to attend he goes up and stays in their house, and their mum goes and stays with her parents round the corner but might come back to sort bits out during the day while DP takes the kids out etc. On a few occasions, my SD (7) has got upset - to the point of tears - after DP leaves to come home because it has been so nice for her to have both parents under the same roof, however fleetingly.
SD has never experienced that in her life until these occasions, and I'd say that she never needed to experience that loss to this extent because her parents split when she was one. So in my experience it definitely has caused confusion and pain for her.
She has seen her mum and DP, and her mum, DP and me all chat together in a friendly manner on a number of occasions so knows everything is OK. To me, I think that's enough. Because unfortunately both she and her brother will never again be in a position where their parents are together, and to me, giving them a small taste of it but then snatching it away again is harsh.