SEE ALSO: Danny Ahn and his niece visit Kim Tae Woo's family on upcoming episode of 'Oh! My Baby'

Son Ho Young was invited to Kim Tae Woo's family vacation, and Soyool, who is known to pour out her affection for her g.o.d uncles much to the jealousy of her dad, had 'Son Ho Young fever.' Son Ho Young even serenaded her as a lullaby to get her to fall asleep, and the Yool sisters surprisingly ate and slept well when Son Ho Young was around, surprising their parents.

Stay tuned for more of Son Ho Young's visit later today!