Hello, andto BP.net...
There is nothing saying that you can't keep them together, however, snakes are not social animals and generally do better in their own enclosures. Contrary to popular belief, snakes don't snuggle. They are competing for the best spots to thermoregulate. Some of the problems you can have are if one gets sick so will the other one = double the vet bills and treatment. If one regurgitates, you won't know which one it was. If one has diarhea, you won't know which one it was. The male will reach breeding size before the female and may try to breed with her and if she becomes gravid before she is a proper size, there are serious health issues that could result from that. If you keep them in their own enclosures you will have healthier and less stressed snakes...
You might want to bump your temps up a little to about 91-92 warm side and about 77-78 cool side...