If custody has already been established previously, a DWI offense will likely not have a significant effect on the custody situation. If you had an attorney for the custody situation previously, you should contact that attorney to get a better handle on the situation. There are many factors that affect custody decisions and you need someone to take a look at the entire situation to give you a better idea of the possibilities. Use this website to find an experienced family law attorney in your area if you didn't previously have an attorney for this matter.
I'm going to change your practice area to family law, maybe you will get more responses from lawyers in this field. Good luck.
This is not intended as legal advice. No attorney / client relationship exists because of this response.
It won't, unless, it is a family violence assault or criminal trespass which could restrict your spouse.
This answer does not create an attorney client relationship. You should hire an attorney for legal representation.