The Keeping Up With The Kardashians star tied the knot with rapper Kanye on 24 May, and they welcomed their first child together, North, the previous year.
"I think when you have a baby there's no time for any s**t," she told The AP.
"Excuse my language. You don't have time for it and sometimes I see things and I'm like, 'I'm not gonna let that slide. This person was wrong.'
"Or whatever I'm feeling, I speak my mind a little bit more after I've had our daughter. I don't know if it's a combination of being married to someone that's super honest and open and says whatever he wants, or just not having time really for anything but the truth and just being real."
Kim, 33, has been on the promotional trail lately for the Kardashian Sun Kissed Tanning line, and Keeping Up With The Kardashians, which will show footage from her wedding preparation later this summer.
Fans won't see the exact moment that Kim and Kanye, 36, said I Do at the Belvedere Fort in Florence, Italy, but they will see the build up, the lavish pre-wedding celebrations and Kim in her bridal gown as she leaves her hotel.
"Married life is amazing," she told the Today show. "We have so much fun. It's just the best. We've always treated each other as a unit and a team so while it feels different to be married, we've always treated each other in that way anyway."
Kim added that she now feels she has her own family, separate from the famous Kardashian-Jenner clan, but they are all still the best of friends.
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