I would say no. It's never a good idea to put 2 snakes together unless you're breeding them.
Not to mention you are going to want to quarantine the little one away from the adult for a week anyway just to make sure the little one isn;t carrying some sickness.
I just picked up a lovely spider male today and he;s off in quarantine in his 10g enclosure. I would definitly recommend getting a 2nd enclosure but if space is an issue, a rack would be really good.