Why was I not good enough to stay in the family?

I make one mistake and you now want nothing to do with me,did you ever stop to think maybe she needs me still?
No you just move on with your new wife and daughter who has her life together and was good enough for her to stay in the family and replace my place in the family.
Am I really that bad of a person that you throw me away the minute I make one mistake,but oh god forbid the perfect sons make any mistakes like cheating on their wife after tens years of marriage? The other son hits hits his wife and thats okay?
Your daughter makes one mistake because she's in love with a man and you disown me.
Thanks to the new step mom who most differently wears the pants in ya'lls marriage.  
Instead of being a man and stepping up to your wife and telling her she has no business telling you that you can't have anything to do with your daughter because of some mistake she made that got her in trouble after 27 years of never being in trouble other than can't get stable on her feet with her fiancé.
That's ******* that you threw me away just cause im not on my feet.
How long did the perfect sons stay with mom and dad before finally being stable?
Even though you have chosen to not be my family I still love you and know that you'll always be my family.
Hopefully one day before its to late you can forgive me for the pain ive caused our family and let my family be a part of our family again.
Love you always The Estell