Megan Fox and Machine Gun Kelly have broken up again. Although this time it's a little different . . . because there's a baby on the way.
Sources say they ended things while they were in Vail, Colorado over Thanksgiving . . . supposedly because Megan saw something on MGK's phone that she didn't like.
MGK left the vacation early, and they haven't seen each other since.
Megan announced her pregnancy in early November . . . and the baby is due in March.
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