Was heißt »insgeheim« auf Englisch?

Das Adverb insgeheim lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Maria war insgeheim sehr aufgeregt.: Mary was secretly very excited.
Tom war insgeheim sehr aufgeregt.: Tom was secretly very excited.
Tom und Maria sind insgeheim ineinander verliebt.: Tom and Mary are secretly in love with each other.
Tom freute sich insgeheim.: Tom was secretly pleased.
Ich war insgeheim in ihn verliebt.: I was secretly in love with him.
Ist Tom insgeheim ein Roboter?: Is Tom secretly a robot?
Maria ist, unter einem Zauber verborgen, insgeheim eine 3000 Jahre alte Hexe.: Mary is secretly a 3,000-year-old crone disguising herself with magic.

Tom and Mary got married secretly.
I'd like to speak to you in private.
But Daphnis was unable to tune his soul to joy since he had seen Chloe bathing. He felt a gnawing pain at his heart as if some venom were secretly at work there.
I'd prefer to speak to you in private.
I know who you're secretly in love with.
Matthew dreaded all women except Marilla and Mrs. Rachel; he had an uncomfortable feeling that the mysterious creatures were secretly laughing at him.
They withdrew to the room next door to talk to each other in private.
They retired to the room next door to talk in private.
Let's go someplace where we can talk in private.
Can I speak to you in private?
Mary admitted that she had been secretly going out with Tom.
Tom secretly read Mary's diary while she was taking a bath.
They married secretly.
Recognising from the smell in the flat that Mary had been secretly baking, Tom began to look for the biscuits.
We should discuss this in private.
She was secretly pleased.
Tom secretly read Mary's diary while she was having a bath.
While Mary was in the bath, Tom secretly read her diary.
Many people believe that Tom and Mary are secretly in love with each other.
Rumors have gone around that Mary secretly smokes.