She admitted cheating and using men in the past—should I trust her?

I met this girl, and i found out she is seeing other guys but that was in our first two weeks ( situation)

but she told me that she cheated on her boyfriend of 4 years , and that she used to use men and that she dated many at once

when i asked her why she did that she said they deserved it and that i am a different person and she will change for me...

should i believe this?

She admitted cheating and using men in the past—should I trust her?
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