Marcello told Lily that the chicken had only been in the oven half an hour. Then ate some.

Dat manchild gonna get ill init. Numpty.

He was pissed off but I honestly don't know how he thought he could get away with it, but he believed so. Sarah neither with the sugar. More consequences...
I didn't view it as particularly derogatory. He could have handled the situation better though, but then again, so could Sarah.