Lauren's cheating ex-husband. Bullies Jim and abandons his son Tyler. Attempts to reunite with Lauren but is rejected due to his poor parenting and infidelity.
Mark treats Jim as a romantic rival.
Mark bullies Jim into leaving Lauren's house and implies that he is getting back together with her.
Mark is Lauren's cheating ex-husband.
The plot states that Mark is Lauren's husband and that they divorced after he cheated on her.
Mark is Brendan's father within the divorced family.
Mark is Lauren's former husband, and Lauren's two sons are presented as the children affected by their divorce.
Mark is Tyler's father but fails to support him.
The plot directly calls Tyler Mark's son when Mark visits Lauren's house and later abandons Tyler.
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