For future reference 20 mins off the nest doesn't mean she wouldn't return. My first broody would get off the nest for an hour, sometimes longer. I kept thinking she wasn't going back, but she did. I'd say check in the evening if she's gone to roost with flock, then she's truly quit.I was watching so when she clearly didnt have any intent to go back after 20 mins I put the eggs in the incubator.
I don't know if she'll accept them again, but you could try if you wanted to.
any eggs left without a name?