It's unacceptable to hide something from your significant other.
Martha just started dating Justin, and they're still getting to know one another.
Martha wants Justin to like her.
Martha focuses on being herself and having fun when she's with Justin.
Martha knowingly omits certain things about herself when talking to Justin in order to seem more likable.
Martha and Justin build their relationship on a foundation of trust.
Justin learns of Martha's lies and begins to distrust her.