If you love romances that are forbidden or kept secret, this film is perfect. A married couple based in New York has a hard time trusting each other after an incident at a friends party. The wife incidentally meets a love long lost that she had in Paris on a morning coffee run in NY. The love still lingers between them and you follow them through a night together, whilst the husband is on a business trip with a female colleague. 

Romantic, heartfelt, great music. It is just perfect. 
It is one of my favourite films.