Kim Kardashian West is "really cautious" about over spending

She said: "If I overspend on something, and a paid post happens to come in at that time, I'll weigh it out and think, 'OK, well I have to pay for x, y and z.' "

And, although the 39-year-old reality TV beauty refused to divulge the going rate for a paid post on Instagram, Kim has admitted she recently turned down a $1 million offer because her husband Kanye West didn't like the company.

She explained: "So there was a fast-fashion brand, a few of them, and they would knock off Yeezy all the time, his colour palette, designs. So this fast-fashion brand offered me a million dollars for an Instagram post, and I thought, 'OK, well that's easy' -- just to wear clothes that I could pick, anything that I wanted, it's a quick post. And when I told [Kanye] about it, he asked me not to do it and said 'out of respect, I don't think that we should be giving them everything, they copy everything.' "

Meanwhile, the 42-year-old rapper has embraced religion in recent years, which has sparked a lifestyle change for his family - including children North, six, Saint, three, Chicago, 21 months, and Psalm, five months - and although his wife Kim doesn't always agree with his views, she wants to do her best to support him no matter what.

She said: "I do think that, you know, he is my husband so I obviously want to honour him and what he's feeling.

"And he's been going through this life change and it's mostly about the kids."