Interesting turn of events...
I collected eggs this morning and they sat in the basket on the counter for a couple of hours while I went out to feed.
When I came back in to check and sort them I realized 5 of them were marked eggs from Socka's nest. They were next to her, not under her so I assumed they were freshly laid by the other girls when I grabbed them.
I candled them and they seem like they're developing, though it can be hard to say when I'm not entirely sure when Socka went broody, less than 10 days of development . . . from what I can see.
I had a incubator free so, naturally, I popped them in . . . I'll check them in a few days and see if they're still developing. If they're still developing I'll pop them back under Socka in a few days.
I'm curious if she kicked them out because she knows they're duds, or if she's just a confused 1st time broody.