They arrived at the Lee's and Yeun Jae immediately came in, announcing to everyone that his Mommy is back.

"Yoona, let's talk" Donghae said as he held her by the arm.
"What do you want?" Yoona asked.
"Jae...Jae doesn't know about anything. He didn't know you left him" Donghae said which stabbed Yoona by the heart but kept it. "All he knows is that you've been travelling outside the country-"
"So, what are you saying?" Yoona asked.
"I want you and I to act like how we were in the past before everything that happened" Donghae said.
"Act like we're in love?" Yoona asked him.
"In front of Jae" Donghae clarified. "Might as well be everytime" he murmured but Yoona didn't catch it.
"So, you never told him anything at all? You didn't told him about Hana, did you?" she asked.

Silence. Again. Hana is a sensitive topic for the two.

"You're right. I didn't. He doesn't need to know" Donghae said. "If he knew about Hana, he will know everything and I bet he won't be that welcoming and excited then" he said.
"I guess you are indeed right" Yoona said.
"Have you told your family about Jae?" Donghae asked her.
"Not yet" Yoona answered truthfully. "Only Sunye-noona and Taecyeon-oppa know" she said.
"You better tell them soon" was all Donghae answered. "Let's go in" he offered.

The two went inside the house and Yoona can't believe that the house is still the same after 19 years. They saw Yeun Jae on Mrs. Lee's lap who is happily listening to the boy's story.

"Jae, looks like your Mommy and Daddy are here now" Mrs. Lee said, pointing to Yoona and Donghae.
"Daddy! Mommy! I was telling Grandma about how happy I am to meet Mommy!" Yeun Jae said happily.
"Really?" Donghae asked with an amused face.
'Mrs. Lee" Yoona greeted her.
"Dear, why so formal? Call me Mom! You're Jae's mother and soon-to-be my son's wife, anyway!" Mrs. Lee said with a smile.
"Huh? Mommy and Daddy are not married?" Yeun Jae asked. "Why?" 

The three adults froze at Yeun Jae's question.

"Well...Jae, they were too young at the time and your Mommy and Daddy are busy. That's why they are just marrying each other now" Mrs. Lee reason