<human>: My wife and I stayed at my brother-in-law's small apartment to help him take care of his daughter for a few days while his wife was out of the country. We slept on the floor of his living room. In order to go to the bathroom you had to walk through the master bedroom/nursery. In the middle of the night, not wanting to wake up my niece, I decided to pee into a bottle. The only bottle I could find still had a bit of apple juice in it, maybe 1/8th full. I emptied my bladder into the jug and then set it down behind the garbage can. My plan was to take care of it the next morning.

Of course, the next day I wake up and completely forget about the piss. My brother-in-law finds it and, thinking that his daughter had put it there, picks it up and puts it back into the fridge. Since it's about 50/50 urine/juice, it doesn't look too suspicious.

Later that day, my bro-in-law fills up my niece's sippy cup with the juice and asks me to give it to her. She was super thirsty and drank almost all of it. You'd think at this point the alarm in my head would start going off, but it didn't.

Today, I wake up and open up the fridge looking for something to drink. I pour the apple juice and immediately upon drinking it realize that something terrible has happened. It takes me a few minutes to put the pieces together. I ask my bro-in-law if he had found the bottle by the trash can. He confirms that he did and I confess what happened. He was surprisingly cool about it and said that as long as she doesn't get sick or grow a beard, it's all good.

Can you condense the text into three sentences or less?
<bot>: I peed into a bottle that was partially full of apple juice, forgot about it, then poured the juice into a sippy cup for my niece. She drank all of it.