I would have a vet check that.
I’m a vet tech and my vet doesn’t recommend poking it yet in case it is infectious it could spread. It is just peculiar that both have it.Being 8 months old could be anything.
Honestly a vet would be the best bet.
Is it soft or hard? The vet can shave the area and stick a sterile needle in it, if it is soft, to see what is in there.
If it is hard, you should wait until it is ripe and soft.
Not a typical place for CL.