u/Gloomy-Zebra-9888

I am searching for a Drarry fic where Draco is working on the Vanishing Cabinet when his and Potter’s child from the future suddenly arrives. Draco begins taking care of the child in the Room of Requirement, which transforms to mimic the child’s actual house from the future (or an alternate timeline). Draco takes help from Blaise and Pansy, but Harry eventually discovers them and is told the truth. Around that time, Teddy and another child also arrive looking for their brother, and Ron and Hermione eventually find out as well. I think Drarry take Teddy and other children to visit Remus and they have hot chocolate. When the adult parents finally arrive to retrieve the children, it is revealed to be an alternate reality rather than simple time travel. The 'future' Draco has black hair like Narcissa, whereas the 'present' Draco has his natural platinum blonde hair. This physical difference is how the older Harry and Draco realize they are from different realities. I don't remember the name or author of this fic.