Will my wife getting a child while i already filed form i-130, affect my petition? What should I do or send to homeland Security

When processing occurs at the NVC that is when the information about the child is submitted.

Depending on where your wife is and where the child is, that information will either be given to the NVC or if you become a US citizen through naturalization, you will need to take specific action to petition your child.

Nothing to worry, you can always update the information with birth certificate of the child. In my experience, it's easy to update it with NVC. After I-130 gets approved, it will be sent to NVC for consulate processing, ( based on assumption that your wife is overseas)