Translation:His secretary introduced her husband to him.
Who would ever say such a sentence, and who would understand it? His secretary (Mrs X, who is Mr Y's secretary) introduced her husband (Mr Z, who is Mrs Z's husband) to him (Mr Y). Yes, this is grammatically correct, but it's just too weird. Please delete this sentence and make up a new one with "swojego" instead of "jej". I don't know what went wrong when this course was created, but there's surely too much 'jej' and 'jego' in it ;-)