Kim Ji Sun asked her to sing a lullaby then and there despite not having a child yet, and Jung In obliged with her beautiful and signature husky voice, impressing the others.
She then revealed that they were doing their best to have a child, saying that she wanted a daughter. Kim Tae Kyun said, "Whom do you wish the child resembled?" and she said without hesitation, "Honestly, I would like for her to resemble my husband, Jo Jung Chi. Jo Jung Chi looks quite delicate."
Good luck you two! Hope to hear good news soon.