Unbelievable. I don't have any advice for you as I've never dealt with a snake stabbing, but this lady is insane!! Did she forget she let her son get the poor little guy? I just don't understand how you could do something like that. So irresponsible. Sorry. End rant.
Thankfully the cuts don't look too deep, hopefully he heals nicely for you. Of course, keep him clean, minimize stress, pretty much what the above posters recommended. I would also look into doing a betadine soak to prevent infection.