She became bicoastal to spend quality time and to work with her daughter and grandson.

Before Joan’s unexpected death late last summer, the Rivers ladies were Hollywood’s best-known mother-daughter tag team.

along with any extemporaneous question that popped to mind.

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The conversation continued onE!

The two also collaborated on WE tv’sJoan & Melissa: Joan Knows Best?

“They completely trusted each other and knew what would work, what would be funny.

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It was sort of a magical combination.”

The two were once on the same flight to New York, unbeknownst to Osbourne.

“I went right to sleep,” she says.

Melissa Rivers

I keep it on my desk.

It says, ‘Kel!!

You must stop stalking me.

Melissa Rivers

Look at seat 3H, you have a friend.

Can you give me a lift?

You don’t snore.’

Melissa Rivers

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Joan loved being a celebrity.

“She knew how lucky she was,” Melissa says.

“She never stopped being grateful.

She’d turn and say, ‘Can you believe they’re still sending a limo for me?

This is awesome!’

“She said, ‘I don’t know what to tell you; your mother stopped breathing.’

The outlook was grim her brain had been deprived of oxygen.

“You have flashes of hope because you’re desperate to hang on to something,” Melissa says.

“But in my heart, I knew.”

Other appearances and her QVC clothing, jewelry and accessories line hung in the balance.

I had to keep everything going.”

Ultimately it was apparent that the 81-year-old Joan would not recover.

“She had a living will and an advance directive that was very specific,” says Melissa.

As hard as it was, I knew the right decision.”