in flagrante
adverb/ˌɪn fləˈɡrɑnti/ 
(also in flagrante delicto
/ˌɪn fləˌɡrɑnti dəˈlɪktoʊ/ 
) (from Latin, literary or humorous)
if someone is found or caught in flagrante, they are discovered doing something that they should not be doing, especially having sex



