A marriage is NEVER legally valid when it is: Incestuous: or Bigamous. Other marriages and partnerships can be declared invalid because of: Age, Prior Existing marriage or domestic partnership, unsound mind, Fraud vital to the relationship, Force or physical incapacity.
Although your facts may be used to show fraud or force, it is not worth the time and expense. File for a dissolution and custody. Ask the court that your wife refrain from drinking within 12 hours of contact with your child.