All Relative

All Relative is a 2014 American independent romantic comedy-drama film directed by J.C. Khoury and starring Connie Nielsen.

[1][2][3] After being rebuffed by Grace who says she's just started dating someone, Harry is seduced by older woman Maren who says she just wants sex.

After various histrionics in which Maren threatens to tell her husband about her infidelity, Harry gives advice to Phil (Maren's husband/Grace's father) helping Phil reconnect with Grace after he had an extra-marital affair.

To prevent this Maren secretly sends an email to Grace from Harry's phone breaking up with her.

Phil is more amused than upset that his wife had an affair with her daughter's boyfriend.