Gliders, like any other animal... you get out of it what you put into it. Gliders can and do bond with more than one person, if the humans are both putting in the time to bond with the gliders.
I have 9 gliders most of them are "bonded" more to me than my boyfriend but they are social with him and he can handle them. However, I handle them more and for longer periods of time than he does. He helps me feed but they are in their pouches still and he helps me maintain cage cleaning when necessary but again they are sleeping when we do that together.
If you both put the time in they will bond with both of you, if you only put the time in with one of them that one will be more bonded to you etc.. There is no reason that you can each have one in a bonding bag or tent time but if they are a bonded pair they should be housed together and shouldn't be separated for long term unless an issue comes up or it's medically needed.
I've had gliders from 12 weeks oop from breeders to 4 yr old gliders when I got them, their is no age limit for "bonding" with people
ps congrats on your new babies