'Happily ever after' in what exactly?
Keep in mind, "ever after" is a long time. It's unlikely that anyone with experience is going to give you the green-light on this idea. But assuming that's what is going to happen, regardless - here is what you will need to make sure of:
the enclosure is sufficiently large for both animals to have individual hidespots, and verify that their environmental requirements are at least similar. You should also be prepared, if you have set the enclosure up correctly for either of these species, to rarely if ever, see them out in the open. Both feel more secure when hidden. Invariably, chances are that one of the animals is going to get the short end of the stick in the living arrangement - and will become stressed. Suffice to say, you're taking a risk. Eventually, I highly recommend separating them into their own enclosures.