Your personal rate (max €188) isn't affected by her earnings. Payment in respect of your wife and children may be affected.
Information in italics is taken from welfare.ie & citizensinformation.ie
If your spouse’s, civil partner or cohabitant is dependent on you or is on a low income you may be able to claim an increase in your payment for him or her. This increase is called an Increase for a Qualified Adult (IQA). If your adult dependant is earning €100 or less you will get the maximum IQA. If he or she is earning between €100 and €310 you will get a reduced rate of IQA. If your adult dependant is earning more than €310 you will not get an increase in your Jobseeker’s Benefit for your adult dependant.
The maximum IQA is €124.80
You will get the full rate Increase for an Qualified Child if you get an Increase for a Qualified Adult for your spouse, civil partner or cohabitant or you are a lone parent.
You will only get a half rate Increase for a Qualified Child if your spouse, civil partner or cohabitant has an income of over €310 a week or has a social welfare payment in their own right. If you and your spouse, civil partner or cohabitant are each getting a social welfare payment you will each get half the Increase for a Qualified Child.
You will not get any Increase for a Qualified Child if you are claiming Illness Benefit, Injury Benefit, Health and Safety Benefit, Jobseeker's Benefit or Incapacity Supplement and your spouse's, civil partner's or cohabitant's gross income is over €400.
The full rate for a qualified child is €29.80