Simplify the following text for a Grade 8 native English-speaking person.
Original: When he hears the pin is Susanna 's , he is overcome with jealousy , especially as he recognizes the pin to be the one that fastened the letter to the Count .
Simplified: When he hears the pin is Susanna 's , he is very jealous , especially as he recognizes the pin to be the one that fastened the letter to the Count .