my son asked for a second bowl of spaghetti then played and for got about it tried to ask for…

my son asked for a second bowl of spaghetti then played and for got about it tried to ask for something else I said no eat your spaghetti then asked for poo corn I said no not till your done (its was a small bowl)he ate some then came upstairs to get me yo tell me he ate it I get down stairs look in the trash he poured it out and the bowl as well it was seriously two bites I asked him why he said he didn't lied to my face and almost got what he wanted smh popped him on the butt and sent him upstairs for lying he's been lying even when i watch him do whatever it is he lied about smh and has been talking back and trying to correct me