My family and I want to fight her. Should We?

my family and I really do want to jump my baby's father 1st baby mom; because she talks too Much. A year ago and this year ( 2021) She told everyone online he cheated on me with her and other women when i was pregnant... Yeah, my family and I may not know her, but she's very annoying. ). Sadly, she'd always message me afterwards, trying to get along with me like that's going to help solve my issues that i have with her for sleeping with my man/talking about our kids. She said, "I only talked About your kids because he threatened my nieces" like ok? Who cares🙄. For 2 years; She's made my life a living hell. I cannot stand that woman. . . . she's the main reason why my relationship is going nowhere... its all her fault and im going to make her pay for messing with me. . .
My family and I want to fight her. Should We?
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