(Bold - Bias) (Italic - You) (Normal - Bias' brother) (Underlined - Niece)       "So, make sure he gets burped before putting him to bed. Or else he'll get really fussy and threw up on you"     "I got it Hyung! Go and enjoy"     "And also, my princess loves to run around the house. Make sure she doesn't bump into anything sharp or fall flat on her face"     "What kind of an uncle will I be if I do that?"     "Oh! And another thing-"     "Don't worry Oppa, I got it covered!"     "Thanks (Y/N)! Just call me when you need anything"     "Of course, have fun!" You said, waving at them.     "Why doesn't he trust me? We're blood related!" He complains as he plops down the couch, snuggling with you.     Your boyfriend's brother is celebrating their 5th wedding anniversary. Since it was last minute and both of you were free, he decided to help out and spend time with his niece and baby nephew. His brother trusts you more as you had a part-time job in a kindergarten before, unlike him he can make a baby cry just by looking. As soon as you both got comfortable, you heard a screeching noise coming from the baby's room.     "Well, that's our cue!" You said patting his leg, asking him to follow.      His nephew was crying on his cot, with his little tiny fists curled up. You picked him up and start to soothe him down. You asked your boyfriend to help and make a formula for him. Just when he was about to step outside the room, you both heard