A second pup?

Your pup is only really at the beginning of adolescence, and there could be a lot of bumps in the road from here to when she starts to really mature. It's very common for teenagers to start blowing off cues and behaviors they previously knew well, to go through phases of being anxious or reactive in situations they used to be fine in, to start finding their environment way more interesting than their owner and struggle with focus and impulse control, and just generally go through growing pains, sometimes until they're two or more. My boy will be two this summer and he's still absolutely working through adolescent behaviors. Personally, I would not bring a puppy home at this stage, as your adolescent will still need a ton of attention and dedicated focus. And there's a lot to be said for a puppy being able to come into a home with a mature, settled, adult dog with generally good manners rather than a rowdy teenager who might encourage behaviors that are rude, obnoxious, or otherwise inappropriate.