Author's Note- I own nothing from Marvel or ABC.
How do you even take care of a kid? Skye still thought of herself as a kid sometimes, was shocked that she could now buy beer legally.
She saw Mike blow up right in front of her, held Ace's face away from the blast to shield him from the sight. Afterwards, there was no trace of a body. They said that he could have been vaporized, flashed away instantly by the intense heat of the blaze.
S.H.I.E.L.D. operatives swooped in quicker than anyone thought they would, taking statements, writing reports. Somehow, Ace got separated from her. She allowed herself to go into shock over the loss of Coulson and Mike, allowed herself to get carted away to mumble answers to the same questions over and over again.
Then, one of the operatives let slip that they were transferring Ace to a facility. He had been abducted from his relatives, so they were no longer considered a viable option. At that, Skye transformed into a frothing at the mouth Valkryie, a Mama Bear, screaming and clawing to get to Ace. Skye had spent her whole life bouncing from one institution to another and she wasn't about to let Mike's son go through that. Mike's last words to her were a plea to keep his boy safe, to take care of him and she couldn't let him down.
In the end, it was May of all people who worked it all out, smoothed everything over, calmed everyone down. They had some down time while S.H.I.E.L.D. worked on some leads for getting Coulson back. The team could watch the kid for a few days until some more permanent arrangements could be made with some distant relatives.
Skye stood in the kitchen of the "Bus", awkwardly making a peanut butter and banana sandwich, debating whether or not she should cut the crusts off for him. She realized, with a start, that she was closer to Ace's age than May's. She still felt like a kid at times, still wanted someone to swoop in and take care of her. She looked over at Ace nervously playing with the zipper of his jacket, eyes still red from crying. She gave him a small smile, trying to be the one friendly face for him in the sea of intimidating strangers. It felt good to take care of someone else for a change.