Unfortunately I think she may well be impacted with lash egg due to Salpingitis and is trying to pass it. The lumpy shape behind that red tissue suggests that to me That would explain why you are not feeling any sharp edges. Lash egg is a cheesy rubbery material. The mass will make her feel...
When you say it feels like a broken egg, can you feel sharp egg shell edges or is it just lumpy?
Is she actually in the process of moulting? Usually birds will stop laying during moult, but sex links will sometimes lay through their moult. Can you post a photo of her butt? If she does not have...