Hello,
Ok, great. Just get a fecal done & let me know how it turns out. It is no problem to deworm them. Hopefully he wont lose anymore weight right now.
You do have an unusual case of housing a male & female together. He probably went through relocation stress though as it is sometimes mistaken for them missing the other one. In the wild they never live in the vicinity or in the same group as the females. They come together for breeding & leave. It is normally too much stress for the female as she becomes overbred.
How many times has she laid eggs then? She should not be bred past this age of 6 though, as it begins to become too hard on her system & many times they can develop health problems from egg binding issues laying at later ages. Laying too many clutches can shorten their life span. That is the main problem of housing males & females together at older ages. Maybe he wont try to breed her as they get older, I don't know.
It is good they have gotten along for so long, there are few cases such as yours.
Tracie