Snape arrives first. Harry breaks out the water-works. If he could get Snape to take him in, that would make everything easier. Yet, even with his wailing, Snape ignores him. He falls on his knees and cradles Lily, sobbing over her body. Harry can understand grief; he knows the shock of it, the heart-wrenching stab of it when you find the body of someone you know, someone you love. He can’t begrudge Snape his grief or his pain, he won’t do that. But to completely ignore a sobbing toddler, to instead cradle the body of that toddler’s dead mother? Harry can be gracious; he can offer Snape a grace period. A few minutes to come to terms with his loss.