"Someday everything will make perfect sense. So for now, laugh at the confusion, smile through the tears, and keep reminding yourself that everything happens for a reason." Even if someday it doesn't make perfect sense, it happened for a reason.
This teacup notifies the drinker that they have been poisoned only after they have finished the entire drink. Gertrude received a similar after-the-fact notification when she began to feel sick after she took a sip from a poisoned drink.