I got this idea from Maya_Dragneel- . go follow her! Shes.the.best!.

Natalie is back home but is supper supper sick. Natsu and Lucy took her to the doctor and theu said she has hypothermia and some kind of cancer that could kill her.
Lucy went out to get some medicine and left Natsu home with Natalie. Natalie starts crying and screaming"PAPA MAKE IT STOPPP!!! IT HURTS!!!". Natsu trys to calm her down but Natalie just screams and crys louder.

((You MUST be natsu and lucy AND your oc!!!))