Stew in your own juice - Idioms by The Free Dictionary
stew in your own juice
stew in (one's) own juice(s)
To leave one alone with one's emotions, usually unpleasant ones like anger or disappointment. Kevin was in such a foul mood at dinner that I left early and just let him stew in his own juices.
stew in your own juice suffer the unpleasant consequences of your own actions or temperament without the consoling intervention of others. informal