Is my Cat goin thru Grievance?

Well it like this. ... My cat Jynxx has just got an abortion. Like three weeks ago. I had to do it because the vet set she is petite and will have complications or will possibly die. So she healed beautifully and in gud health. Now her brother had a son(ozzy) who is three mo. Old. She cleans him, hold him down like mother cats do when the kitten wouldnt stay still. She then started walking around growling then looking for him tto clean again. Shes also being protective of him as well and tries to carry him. Mind you the mother and the daughter lives with us too. Experienced cat owners please..