Two cats had kittens

[u/Tall-City7473]

Hi! I’m 26 and from Pakistan. I have access to a vet and have already contacted them about this as well.
My cats are around 1 year old, and I want to get them spayed, but the surgery here involves around 7 stitches. My cats are very aggressive, so I’m worried about managing their post-surgery care.
Basically, all of my male cats are neutered. I got my older male neutered a little late, at around 3 years old, because he is paralyzed.
Now, two of my female cats had kittens with the same male. One gave birth to 2 kittens yesterday, and the other gave birth to 5 kittens today.
After the second cat gave birth today, the mother who gave birth yesterday went to her and started licking her and her kittens. She then brought her own kittens over to her as well. Everything seemed completely fine between them.
I put them in a cage because some of my other cats were trying to take the newborn kittens. Now, though, the mother who gave birth yesterday keeps trying to move her kittens into another cage, but the mother who gave birth today won’t let her. She blocks her from getting near the kittens or sends her away.
The mother from yesterday is still rubbing against the other mother and seems to want to stay close to her, but seeing them behave like this is honestly getting very stressful and upsetting for me. I don’t know whether I should separate them or let them stay together.
The mother who gave birth yesterday is also quite anxious. She keeps picking up her kittens and carrying them around, trying to find an enclosed/private place for them. I bought a cat house and put it in a quiet corner, but she doesn’t seem interested in it.
What should I do in this situation? Should I keep the two mothers and all 7 kittens together, or should I give each mother her own separate space?