Black snakes

I was walking through somebody's house and walked through a child's bedroom.  There was a wading pool along one wall and there were two black snakes swimming in it.  They had big eyes.  They started to come after me and I left the room.  The people who owned the house told me the snakes were pets and slept with their daughter at night.  They told me I should try being friendly with the snakes.  I laid down in the bed and one of the snakes came and snuggled up next to me.  It rolled over on its back and it had legs.  It curled up like a cat and fell asleep.  I felt it's skin and it was dry and smooth and soft.  The snake was actually very comforting to sleep with.  The people who owned the house said they raised the snakes specially to be friendly like that.  They said the snakes were only friendly for a few years and as they got older they started to bite.  I saw one of the snakes that was a little older and it had grown legs and short brown hair all over.