The spider made another egg sac on Monday night and spent the rest of the week hanging out and spreading her web ever larger and more obnoxiously over all three tomato plants. Then today she was gone, and her web was all torn up.
I don't know if she was just spent or if a bird ate her or what. But we've all read Charlotte's Web; I knew something like this would happen eventually. I have to admit I'm still pretty bummed.