there is always risks no matter what with any animal/ reptile for that matter. i do keep reptiles together - childreni, coastals, blackheads, bredlis, diamonds, darwins, water pythons. but i do take a risk and have done so for years with out any problems but other people have encounted problems and needed to separate.
i will be splitting up some pairs/ trios up as i just bought 6 multi bay enclosures with a total of 17 bays plus 4 hatchy racks. but only cause i have alot more space now, they get on well and have done so for years.
just put them in together for breeding till you are 100% sure there are no problems, enclosure must be very large and separate hides ect for full time living togather