How old are your gliders? Do you have lineage to verify that they are they unrelated?
They may be maturing and if SuzieQ is in heat it will definitely affect Abu's behavior.
You will notice these 'misbehaviors' every month when she is in heat.
Unless you are fully prepared to deal with joeys, you may want to consider having Abu neutered very soon. There is a lot of things to consider before breeding your gliders. If you cannot verify that they are unrelated they should not be allowed to breed. If SuzieQ is under a year old she is not physically mature enough to carry joeys without some sacrifice of her own strong bone growth and it could affect her health down the road.
If you do allow them to breed, you need to inform your self on care of rejected joeys, especially if SuzieQ is very young. This web page will help.
http://www.suzsugargliders.com/educationalarticles.htm