Both art and fic are pretty cute. I think the author managed to make the kids real, which isn't easy to do and the reason I don't read a lot of fics with children. The mother having two strange guys she doesn't know babysit her kids was a bit hard to believe though - doesn't she have other friends, family, neighbors? And the reason why Sam and Dean have to pass as a couple was annoying, even though I love the gen pass-as-a-couple trope.