According to Joe Jonas, he was under the impression that his ex Taylor Swift did not hold any grudges against him, but he has since come to realize that this is not the case.

Jonas’ bubble regarding the popstar has burst since Sophie Turner joined him on girls’ night outs following their divorce.

After Turner and Jonas split, not only are they hanging out, Swift has even offered her New York City apartment to Turner.

Apparently, the Jonas Brothers band member is “disgusted” with Swift over the “mean-girl high-school game” she is playing with him.

“This is so much more than just a break-up – it’s about the future of his and Sophie’s children,” the insider shared about Turner and Swift’s growing closeness.

In order to keep his daughters close, Joe will go to any lengths, even if that means going to battle with Taylor.

Taylor may think she’s coming out of this looking cute, but he thinks she’s being incredibly immature.”

According to the insider, Jonas had difficulty negotiating Swift’s behavior because they were on “perfectly good terms” prior to his divorce from Turner.

“They checked in occasionally, and he saw her as a good friend considering their history,” the insider shared.

Taylor’s friendship with Sophie is not a problem for Joe. His main concern is that her meddling could make this split even messier than it already is.”