Are you talking yellow like this? This shows you panthers with yellow mouths and it's a sign of good health https://www.chameleonforums.com/show-me-inside-your-24959/
You are going to need to see a vet for both of them asap. If they are suffering MBD they require treatment of liquid calcium. If the female is egg bound, the vet will be able to give her something to hopefully help those eggs out. I don't know that she'd hold them over six months though...