I've plotted out a linked short story collection that I'm excited about, but when I showed it to my novel-writing sister, she said it was laid out like a novel. Let me explain.

In my last linked short story collection. There was a main bad guy that that the characters had to stop, but there were mini-adventures without the bad guy stories sprinkled in-between the ones involving the bad guy. These mini-adventures helped the characters met people who would eventually help them stop the bad guy, though.

In this one I'm plotting all of the adventures come right after each other, no mini-adventures without the bad guy (if she's there directly or just watching in the shadows).

What I'm trying to ask is if it is okay for a linked short story collection to read like a novel.