What's the common phrase for "... tell you in a better moment"?

Question

I thought tell you in a better moment was the correct phrase, but Google disagrees.

What the common/idiomatic version?

Example sentence:

She wanted to confess her affair to her husband. However, she didn't want to tell him now. She wanted to tell him __

Answer 1

We often say "tell you when the time is right".

Here are some examples from Google books.

In the Original Poster's sentence we could say:

She wanted to confess her affair to her husband. However, she didn't want to tell him now. She wanted to tell him when the time was right.

Answer 2

I agreed with Araucaria's answer. But in case you really want to use the sentence "tell you in a better moment", you could say:

She wanted to confess her affair to her husband. However, she didn't want to tell him now. She wanted to tell him in a better time.

This is grammatically correct, because in the phrase "tell you in a better moment" the word "you" is an object pronoun referring to the third person and can the replaced for "me", "him", "her", "us" or "them" according to the context.