It's an ongoing battle between exes Future and Ciara. In several tweets posted Monday, Future called out his ex-fiancée, slamming her with claims that she refused to let him see their son Future Zahir Wilburn, whom they welcomed in May 2014 while they were still engaged.

"This bitch got control problems..." he tweeted. "I gotta go through lawyers to see baby future...the f--kery for 15k a month... I just want baby future that's all... I been silent for a year & a half... I ran outta patience. Get ready for this classic."

Ciara has not publically commented on Future's accusations.

However, a source close to the songstress is saying Ciara has never prevented Future from seeing his son, according to E! News. The source added that Future "does not and has not paid $15,000 in child support."

The Freebandz CEO is reportedly jealous that Ciara has moved on and is now in a relationship with 27-year-old Seattle Seahawks quarterback Russell Wilson, who she started dating last spring.

Ciara and Future split after rumors of the rapper's alleged infidelity.

"Future has told her he hopes she fails in everything she does and that's just being evil," said the source, according to E! News. "He is unable to move on and co-parent in a healthy way."

Another source claimed "Ciara has said that Future uses the situation to promote his music by staying in the press using her name," according to People.

This isn't the first time Future has openly criticized Ciara's parenting skills.

"I'm not bitter. People think I'm bitter because she moved on, but I'm good. I'm taking care of me. I don't need him — she needs him," said Future during an interview on The Breakfast Club this past July about photos of Wilson pushing Future Jr. in his stroller. "Of course, I wouldn't want someone pushing my son. Like, that's the number one rule... You know this dude for a few months and you're bringing him around your kid? Who does that? Nobody does that."