Hello I have a question. I think I scrolled down the FAQ tag and I didn't find the fic I was looking for. But it is hard to find it. I was looking for it for at least two hours. So basically I don't remember much, only that Hermione had to babysit (4 years old) Teddy and Draco was there too. Then I remember that they babysit him together in the park and he changed his hair to blonde like Dracos and he changed it again to something between Hermione/Dracos and some woman thought it is their son.
I believe this is the one you are looking for:
Mistakes of a Drunken Night - On the night of their graduation Hermione and Draco get drunk…and married. After a year and a half of marriage- a time filled with arguments and mixed emotions, they are told that they have to have a child on the way by their second anniversary.
They both babysit Teddy in one of the chapters and the same thing that you described happens.
A Series of Unfortunate Events - T, 21 chapters - Set after DH and will completely ignore the Epilogue. Hermione keeps running into Draco Malfoy. Will anything other than disaster come from these chance encounters?