Did anyone give you funny looks with your stuffed bra
You are okay yet not to have a repeat performance. But start to prepare two new cages for the boys and girls. They are comfort drinking more than by necessity. If you are able to see poor mum's nipples next time you have her out you will see they are rather red and sore getting. She will only really take another 7 days of suckling before getting very grumpy with them and wanting her own space.
I would sex them today and then decide if you are going to remove them all, remove all the boys leaving the girls for another seven days, remove the girls leaving the boys for another seven days, remove those you can definitely sex leaving the undecided ones for you to sex over the coming seven days until all have gone to split sex groups. Or remove the big strong ones into their split sex groups (make sure at least two of each sex if doing this - don't want any living alone just yet) and leave the smaller ones with mum for a few more days.