Get a direct confession

It's not blackmail, but getting an overt admission that Kelly watches you, spies on you, could give you some power to push things past fantasy and into reality.

"Just tell me why you spy on me. I know this isn't the first time," you press. This is the first time you actually knew about the spying, but your app made sure that this wasn't a lie (technically). You decide to soften the approach a bit at the end. "I won't tell anyone, I just want to know the truth."

She squirms, clearly uncomfortable even admitting to herself what this is about. "I...I..."

"You what?" Just a little more pressure...

"I... like you...a lot," she mumbles.

"Like me how?" You know the answer, but you want to hear it.

"Like... more than a sister should."

"Exactly how much more?" She's blushing furiously at the admissions.

"Like.... a crush."