Parents of Augustus (Gus) :

Ava :

Jayden:

Parents of Rae and Luna:

Freya:

Ashton:

Mated Pairs :

Gus and Luna

Luna :

Gus:

Rae and Sebastian

Rae:

Sebastian:

when they finally embrace the alpha power that has been passed on from their father, their powers are more intense and are on a larger scale than normal alpha's since having twins is a rare turn of events and because of their heritage ( ancient alpha blood, leading back to the first wolves made ), together the girls could turn the world to ashes if they so choose, not many packs know of the power that they can posses until one pack who is very superstitious and know of the legend of the Alpha twins ( but doesn't know about their ancient lineage ) captures them both and intends to mate and marry the both of them to keep the power for himself and use them as a weapon ( he could threaten Sebastian and Gus to get the girls to cooperate ).

The girls comply and maybe they are forced to do some evil things ( maybe destroy a pack or maybe execute some people ) and this changes the both of them but it changes Luna into someone who is hard and from the outside she seems cold and almost evil but she is just trying to protect herself, the girls would eventually learn that they have more power than they have been told ( one of them or both could try to seduce him into thinking that they want to do this and be strong and powerful with him by their side ) before they can rebel against the Alpha that is holding them captive the boys find them and are shocked at the change in the girls and they try to form a plan to get them back and both of the boys try to talk to Rae and Luna alone because from the act they put on it seems that they like the power and the evil that they have been doing, both Rae and Luna push them away since any weakness could ruin their plan of killing the Alpha that has kidnapped them

In the final battle to escape it could be on a full moon when their powers are at their peak (maybe?) and they could both attack the Alpha and have a big battle between the twins and the Alpha