Sometimes on retained sperm clutches, one or two eggs will do that. They don't mold, just sweat and them turn gooey and shrivel up. Sucks yeah, but thats nature...or should i say human-modified nature.
There is a good chance she is NOT HAPPY about sharing her cage. Carpets can be HIGHLY territorial, with a lot of display behavior. Try giving her her own space and see if that helps.