While making hot chocolate......
"Here pour some milk in it!"
she pours the milk.... just before he goes to drink it she decides to check the expiration date
"WAIT! don't drink that! the milk is bad!"
once she checked the expiration date she realized it expired 3 weeks ago
"sorry I tried to poision you!"
"What you tried to poision him!??!" person who walks in a minute later
"Don't worry we'll make you a new one!"