big male/small female definitely no. big female/small male? it works for me.
try introducing them to each other over a period of days/weeks and see what type of response you get. that will give you some sort of idea as to wether or not it's a good idea.
i was in a similar situation last year. i was given an adult (8ish years old) and during one of it's 'walkabouts' (i used to give it restricted access to my living room on an evening, yes i know :grin01: ) and it was during one of these 'area familiarisation evenings' that i managed to lose track of her. and thought "it's gone. and has decided to check out the big wide world"
i bought a new one (9 months old) a few days later to replace it and got a small faunarium to accomodate it in because the tank i was given originally was huge.
a few days later the big one must have decided that wherever she had been was too cold to put up with and happened to quietly slither into the living room where i was sat. big problem - two snakes, one tank. my idea was to see how the bigger of the two took to the little one, if it did at all. i initially put the faunarium into the tank, but it was covered all round with a piece of hessian(cloth) to create a darkened area. and over the next few weeks
i increased the amount of hessian i was using so that the bigger snake became aware of the faunarium and could see the other snake. and likewise the small one could see the bigger one. there did not seem to be any "ooh, that looks good enough to eat" type actions from the big snake.
next step was to physically introduce them to each other. this i did by holding the big one to make sure it couldn't make any sudden "eat it" moves. they checked each other out and were ok with it. the step after that was to allow the little one free run of the tank. and over the next couple of weeks i increased the amount of time i was allowing the little one to spend in the tank . at this point it was still going back into the faunarium at night. finally after about 4 weeks of letting them get used to each other i put the small one into the tank they are quite happy.
that was in october last year and there has never been any dramas with them