Megan Fox reportedly discovered messages from other women on Machine Gun Kelly’s phone, which ultimately caused their relationship to end.

The actress, who is currently expecting her first child with Kelly, is said to have ended their relationship after discovering he was speaking to other women “behind her back.”

Megan Fox and Machine Gun Kelly have had an on-off relationship over the years, but a source recently shared that their split is “final” because she grew tired of their “high school relationship.”

Fox called it quits on her romance with Machine Gun Kelly, and reports suggest the issue was based on his alleged infidelity.

The pair had traveled to Vail, Colorado, for Thanksgiving but had to cut short their trip after the “Transformers” actress found “material” on the rapper’s phone that upset her.

“When they went away for the Thanksgiving holiday, she became suspicious and decided to go through his phone,” a source told Page Six.

The insider added that Fox “found text messages involving other women and decided she was done” with the “Hotel Diablo” rapper.

The 38-year-old actress is said to have always “had trust issues” with Kelly because of “past behaviors.”

However, she decided to stay put and work to “rebuild her trust with Colson and was excited to grow their family together.” However, his alleged infidelity made her throw in the towel on their relationship.

“Megan is a strong, independent woman and doesn’t need a man in her life,” the insider said.

According to People Magazine, Kelly’s alleged infidelity took Fox by surprise, with a source sharing that she has been devastated since their split.

The insider noted that the actress was “blindsided” by the recent split and that she was “distraught.”

Yet, she’s “trying to focus on” preparing for their unborn baby as “it’s her priority.”

Another source told the news outlet that their relationship “has always been bumpy,” but they could eventually reunite.

“They love each other but don’t have compatible personalities. They’re both hot-heads, dramatic and stubborn. When they’re good together, they’re great,” the insider said, adding, “They will very likely get back together. They’ve split in the past and then worked things out.”

Fox and Kelly’s break-up is quite complicated as it comes barely a month after they announced that they were expecting their first child together.

Not even welcoming a baby can change her mind from splitting from Kelly, as sources told the Daily Mail that she’s grown tired of his behavior and is now turning her attention to raising her unborn child.

“Megan was just done with all of it,” one source told the news outlet. “She was done with his behavior and the way that he treated her.”

“When she fell pregnant, he thought it meant that she would stay with him no matter what – and it is not the case,” the source added. “The most important thing in Megan’s world right now is her unborn baby and she has no problem raising the child on her own.”

Fox is also the mother of sons Noah, Bodhi, and Journey, whom she shares with ex-husband Brian Austin Green. Kelly has a daughter, Casie, with ex-wife Emma Cannon.

According to WWD Magazine, a source claimed that Fox had cold feet during the early stages of her pregnancy but has since opened up to the idea and is handling things better.

“They are very excited. [Kelly’s] basically telling everyone he knows,” the source said. “Megan felt nervous early on in the pregnancy, but she feels more relaxed now. She’s trying to enjoy it. She loves being pregnant.”

They added that the then-engaged couple is “doing well” and “focused on the baby right now,” noting that “It doesn’t seem they will get married before the baby arrives.”

The source who spoke to the Daily Mail noted that this current split is permanent and added that her friends support her decision.

“She’s left him before, but this time seems final. Her friends support her wholeheartedly and over the past few years they have grown to really dislike him,” the insider shared. “Her friends were worried this was going to happen.”

However, another source told Us Weekly that, due to the on-off nature of their romance over the years, they may come back together at some point in the future.

“They broke up in late November,” the insider shared. “They were trying to make it work again after the pregnancy, but they are both too hot-headed and fell back into their constant fighting. They can’t get on the same page and it’s not easy for them being together.”

Alluding to their on-off history, the insider stated that while “they are done for now,” Fox and Kelly “could very well be back together” in the future.