Have you given her an egg-laying box? (think of it like a humid hide...nice damp moss will make an egg-laying corn snake very happy...that, & privacy!) I've never had
a rat snake laying one egg per day...that's not right at all, & might enhance her chance of being egg-bound, so get to it! (some snakes not given proper nest box will lay
in the water bowl!)
BTW, when you know a snake is due to lay eggs, you want to furnish the egg-box well in advance, so the snake is familiar with it, for best results. Another thing that would probably work if you have it on hand (instead of a humid hide box) would be a cork bark tunnel filled w/ damp sphagnum moss...many snakes lay their eggs in & under rotting tree logs.