Nobody Nose Libby Like Sabrina Nose Libby - S3-E9
Other mistake: After Salem and Sabrina are shrunk down into the toy plane you see the kitchen from inside the cockpit, but when they are shrunk down to be tiny enough to go into Libby's nose, the view from inside the cockpit is the same as it was before they were shrunk down even further. Since they are that much smaller everything should be seen as much bigger.
Answer: Those are her roomates. The first season Sabrina was in college, she moved out of the house that she shared with her aunts and she moved in with 2 girls plus another guy. I think her aunts went back to the other realm since the 2 actresses (Caroline Rhea and Beth Broderick) who played them left the show. The guy roommate also left the show the same time as Sabrina's Aunts. Then Sabrina and her roommates moved into the house.
Dan Sgambelluri
Hilda got married and Zelda became 8 years old again so that Sabrina could have her live life back.