I saw a bloated male lion in Kenya. He looked as though he had swallowed a basketball and just lay there. I'm sure this lioness is pregnant. Her tawny colour melted into the background except for the black on her ears, the end of her tail and the swollen nipples visible from a distance. I think you are right that she was looking for a hidden nesting spot. The camera tracked her for a while and then she just disappeared into some bushes.
I noticed a while back but forgot to post that there are new cameras . I particularly enjoy the camera at Kamfers Dam --so many different birds but really the flamingos are the star of that particular camera stream, plus the spectacular sunsets .