I have seen the same social family behavior in over 150 pair and their offspring. The only place I differ with Ingo is how long to keep the young offspring in the enclosure.
Size and room for multiple territories is key. I'm not able to provide huge enclosures for each family group so there is just not enough room for the young males or females to find enough space from the adult pair once they reach maturity.
I usually pull the young males at 5 months or they may drop a tail. Older juvenile females will get run off by the adult female. This is noted by nips and heavy bites to the lower back as Kita has observed and I will pull them as well.
Since I am still working with a majority of imports to establish various morphs, it is ill advised for me to leave a wild caught female paired together through the entire year. She will be poorly 'developed' to handle the heavy egg production typical of captive pairs. As we have noted in other threads, she will become exhausted and pass from kidney failure which is typically incorrectly noted as egg binding.
So, I typically pull the male for 4 to 6 months and allow the offspring to be raised up with the adult female. In some cases I have allowed the oldest male offspring to breed the mother to facilitate line breeding. In all other cases I re-introduce the original male next season after the mother has rested.
I too have noted that the segregate males do not tend to take well to other females while on leave from their long-term partner.
In the super large enclosures and the actual reptile rooms where Tokay pairs have enough space to find their own corners, I have seen all manor of acceptance within the Tokay 'community'. In one room where Tokay run free to clean up loose crickets, I saw a dominate female eat the eggs of the other two females in the room. When I removed her, the other two females, (siblings to each other), pooled their eggs with the third female I let loose with them. When I found their egg laying site, there were 21 eggs in a double row down the wall with only the top pair starting to hatch out.
There was no 'nursery' there 4 months before.
As to the original question, for the average enthusiast, keep them separate like Ethan or as a pair. Enjoy!
Michael' Tokay Hoard @
www.billewicz.com