It looks like there is a good reason why Future has been making a lot of remarks about his bitter war with his ex-fiance Ciara over their son, Future Zahir Wilburn. After the Atlanta-based rapper lashed out at the singer for not allowing him to spend more time with the tot, a new report says he might be lashing out at her just because he's jealous of her new relationship with Seattle Seahawks quarterback Russell Wilson.

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According to Page Six on Wednesday, sources close to Ciara say that Future is having a hard time seeing Ciara happy, and worse, he is trying to use her name to promote his music.

Future wrote to his 2 million Twitter followers earlier this week, "This bitch got control problems . . . I gotta go through lawyers to see babyfuture . . . the f---ery for 15K a month."

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A source says Future's statement is simply untrue as he doesn't pay $15,000 a month in child support for the ex-couple's son, who was born back in Mary of 2014.

An insider close to Ciara says, "He's jealous that she has moved on and is happy. He is [unwilling] to move on and co-parent in a healthy way. He does not, nor has he ever, paid $15,000 in child support . . . Ciara has never prevented him from seeing his child."

And while Ciara has not made any comments about Future's accusation, the insider says there's a good reason why.

"She's very calculating. She used to have paps waiting for her when her flights would land, so I wouldn't be surprised if she has other people speaking out against [Future] and staging her candid photos to tick him off," the tipster added, explaining, "Future has told her he hopes that she fails in everything she does, and that's just being evil."

Tags: ciara Future Russell Wilson