Jake didn't know how you time traveled or whatever. He wasn't sure you knew either. All he did know, he was fighting, got knocked out, and woke up to staring into his eyes.

Well, your eyes. That you shared with him. Because you were his daughter. In the future. Because that makes sense!

He was a bit freaked out. He didn't even believe you until you showed proof. And now, he stood in his crappy apartment, getting the couch ready for you to sleep on. He didn't understand any of this.