Jaylene didn't stay in the hospital after the donation surgery. Even though the nurse suggested her to rest for a few hours, she refused and left the hospital directly.
She remembered that Joseph Thompson was going to City G, and she was worried that if he called her and found out she was still in the hospital, he would certainly rush to the Caring Hospital where she lied about being last night.
So, she had to get to Mateo Torres's house before Joseph arrived in City G. This way, she could wait at Mateo's house for Joseph, and he wouldn't suspect anything. After all, she could say that she sent her aunt off on the train.
Jaylene had visited Mateo's house with Joseph before, last year. She still remembers that it was in May, five years ago, when Joseph took her to City G and left her on the roadside after receiving a phone call.
Fortunately, she had to take a taxi to find Mateo's Pure Villa Mountain Villa after being left on the roadside, so she remembered its location.