I'm sorry to hear that you've lost a friend.
I have been reading and trying to help get an answer to your question, and from what I have seen, generally they do not remember their babies, as a human mother would remember hers. It does go on to say that after both cats have been reintroduced, that they may fuss and fight for a while, but as long as no one gets injured in the fighting they will sort out their own 'pecking order'. And will most likely come to get used to each other, in some cases being the best of friends, and in others only tolerating the others existence....I hope this was some help. I'm sure someone more knowledgeable than I am may be of more assistance. Hope it works out for you.

You really won't know until you introduce them. Bring the kitten in and isolate him to one room just as you would any new cat. You'll know pretty soon if mama remembers him.

Has mama been spayed and has the kitten been neutered? If not, I'd have both done before bringing in the kitten.

Yes, both cats have been altered. We'll cross our fingers and see!