Ah, well, that's the bane of having intact rabbits, guess how I know
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How old are your rabbits, sneaked the buck into a harem or is it just one doe? I reckon this wouldn't be your first litter, so you know the basics, that it's not the time of year when someone is happy about it, well, I just go from one day to the next, the inconvinience is more bearable in small doses.
They don't need much to raise litters for the first 8 weeks, more space, privacy at times, more food. A shelf to get away from the kits for at least 4 weeks. I never had problems with first timers, 2 years ago I only found out about a litter because there where suddenly 11 rabbits hopping around in a hutch where only 5 doelings should have been, and my 7yo Fury gave me a surprise litter almost every year, it's amazing what effort they put into getting together.
I would keep them up for adoption, just make clear they could be pregnant. It's not sure they are though, they can be done in seconds, but if the does are not in the mood, and all parties unexperienced there are chances that he didn't hit every mark.
Age comparisions are pretty useless, rabbits evolved to breed as soon and numerous as posssible, they excell at that. And comparing them with current, lokal social codes (other times or regions are different) isn't a good template to apply on still pretty much wild animals.