May 23, 2018 10:00 AM

Jamie Lynn Spears is settling into life as a mom of two.

The singer-songwriter and husband Jamie Watson welcomed daughter Ivey Joan on April 11; the former Nickelodeon star is also mom to daughter Maddie Briann (who turns 10 next month) from a previous relationship.

“Things are getting back to normal now,” Spears tells PEOPLE of her first month with a family of four. “It’s definitely shifted the dynamic a little bit, because you go from having one child for 10 years, and that’s your full focus.”

Adds the 27-year-old, “Having to find that balance, it’s important to have a partner who can pick up the slack where you can’t.”

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Jamie Lynn Spears and daughter Ivey Joan
Studio Tran Photography

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The Kentwood, Louisiana-based star and her businessman husband have found an efficient system for splitting up responsibilities — for instance, Watson, 35, handles Maddie’s pick-up and drop-off schedule for basketball and softball practice, while Spears is on diaper duty and feeding.

“I am breastfeeding, so she is pretty on-demand with that,” Spears says of Ivey.

Jamie Lynn Spears with husband Jamie Watson and daughters Maddie and Ivey
Studio Tran

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The star also nursed Maddie when she was baby but says the experience is different this time around because she has two kids to take care of.

“Now I have another daughter who I have to go and run behind. So the breastfeeding takes on a new life because, when I’m sitting at my daughter’s softball games, I’m like, ‘Don’t you dare!’ ” Spears jokes of her younger child getting hungry in public.

“So it’s a different story, trying to find and plan when to breastfeed. I can’t say, ‘Hey, I’m gonna go home and breastfeed’; it’s not just about one baby, it’s about two,” she adds.

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Recently, baby Ivey did get hungry at one of Maddie’s softball games.

“I sat in the car at the ballpark and breastfed. I was like, ‘If one of Maddie’s friends sees me, she’s gonna be so livid,’ ” Spears recalls. “You gotta do what you gotta do!”

But Spears enjoys nursing, and the connection she feels to her baby through it. “It’s such a bonding experience,” she says. “I love it; I wouldn’t change it. It’s one of the most natural things in the world.”

For more on Jamie Lynn Spears and her new baby girl — including exclusive family photos — pick up the latest issue of PEOPLE, on newsstands Friday.

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