Do not put them together.
Before even thinking about introducing glider, the most responsible thing to do is quarantine the new addition(s) for 30 days or so, taking them to the vet before and after the quarantine. In the first vet visit you need to ask for a health check and fecal test, the fecal is to check for parasites. Parasites can take a while to hatch, that's why you keep them separated for 30 days, and do another fecal test after that period. If the test comes negative, then you can start on introductions.
The female you've receive is probably very stressed. Not only she lost a partner, she was move to an entirely different environment (i.e. your home), and has now to deal with not raising joeys on her own, but a potential threat to her joeys, that is your male. All of this make it likely for her to lose her joeys, and even worse if you put your male with her, since it also introduces the possibility of your male killing the joeys (they are not his joeys, he has never been introduced to them or your female; they are all strangers).
Believe or not, gliders can be very territorial and aggressive, specially a female trying to protect her joeys or a male wanting to become the dominant one. Glider fights can be very nasty, resulting in sever wounds, and even dead (more so for small joeys).
The best you can do now is prepare for in case of joey rejection, and having the need to hand raise them yourself. You can find some info on how to do this here:
www.suzsugargliders.com/handraisingajoey.htm
Here you can find about signs of joeys rejection and more useful information:
www.suzsugargliders.com/helpforrejectedjoeys.htm
In her site you can also find what you need in case of any of this.
It is my opinion, that you should not try to put them together. Is just too much risky, not only for the joeys, but also for the adult gliders.