“- Mortdecai: Oh, my darling, I tried desperately to be unfaithful to you, I really did. But I just couldn't do it.
- Johanna: It's a terrible moment when you finding yourself falling in love with your own spouse, isn't it?
- Mortdecai: Now that is the look that softens every bone in my body, except one”
Johnny Depp - Mortdecai
Gwyneth Paltrow - Johanna

“- Mr Neville: That was ingenious.
- Mrs. Talmann: Since when has adultery been ingenious? You are ridiculous, Mr. Neville.”
Anthony Higgins - Mr Neville
Anne-Louise Lambert - Mrs. Talmann

“- Robby Ross: Come on, Nat, you don't consider a roll in the hay with your secretary adultery?
- Natasha: What do you call it, shorthand?”
George Segal - Robby Ross
Jacqueline Bisset - Natasha

“- Sammy: I don't know what the Church's official position is on fornication and adultery these days, and I felt really hypocritical not saying anything to you about it before, but... what is the official position these days?
- Ron: Well... it's a sin.
- Sammy: Good, I think it should be!”
Laura Linney - Sammy
Kenneth Lonergan - Ron

“It was better when they screamed at you from the box for having sex with your married boss, they told you what a terrible thing it was, they were really mean to you. Maybe it would be better if you just told me that I'm endangering my immortal soul and that if I don't stop, I'm gonna burn in hell.”