She was ovulating in your previous pictures. Before ovulation, if you palpate you can feel the developing follicles -- they feel like a string of pearls and grow from the size of a pea to around the size of golfballs before the female ovulates. After ovulation, they are officially either eggs or slugs and if you palpate, they will feel softer than before (slugs will feel a bit hard still).

In your latest pics, she looks like she has the ridged back (raised spine) of a gravid female. You can expect eggs and/or slugs from her about a month after she sheds.