Gwen Stefani and Blake Shelton are co-parenting Stefani’s three sons with Gavin Rossdale. But with Father’s Day just around the corner, the kids are expected to spend the special day with their biological dad. This may not be a big deal for some, but the country singer may have mixed feelings about this.

Stefani and Rossdale’s children — Kingston, 12; Zuma, 10; and Apollo, 5 — are very close to Shelton now. In fact, the former always uploads photos of them hanging out and having fun together. They also attend church service as a family, so it’s possible that the “I Lived It” singer may also be wishing to be with the kids on Father’s Day.

However, the fact is that Stefani and Shelton actually think that it’s better for the children to be with Rossdale. This is because the couple is aware of how much the kids love their father even if they rarely see each other. And besides, it’s his day. “Gwen and Blake are totally supportive and understanding of Gavin having the kids on Father‘s Day as it’s his day and that’s their father,” an insider told Hollywood Life.

“Gwen and Gavin have had a challenging time co-parenting. They don’t see eye to eye on several things so Gavin will have the kids on Father‘s Day and both Gwen and Blake knows that’s best for the kids as it’s his day,” the insider continued.

In any case, observers noted that while Shelton and Stefani have the best relationship as a couple, Stefani needs to improve her relationship with her ex-husband. The songstress praises Gavin as a good dad, but she is having a hard time dealing with him when it comes to co-parenting their kids. She feels that she is doing most of the work, so she wants her ex to help out more, especially in making decisions when it comes to school and their kids’ activities.

“Gwen feels she’s constantly making decisions for the kids alone,” the source told the publication. “She knows Gavin is a great dad when he’s with the kids, she just wishes she’d get a little more help. She gets frustrated and overwhelmed with it all sometimes as Gavin sometimes finds it challenging to balance career and kids.”

Meanwhile, Shelton and Stefani would be very busy as they are set to begin their work as part of “The Voice” Season 17. The latter joined the show after Adam Levine announced his exit after sitting as one of the coaches for 16 seasons.

Blake Shelton and Gwen Stefani Singers Blake Shelton (L) and Gwen Stefani perform on the Honda Stage at the iHeartRadio Theater on May 9, 2016, in Burbank, California. Kevin Winter/Getty Images for iHeartMedia