Legal Question in Family Law in Nevada

You provide too few details in your question for a very good legal answer. I recommend that you meet with an attorney who will provide 30 minutes of time to get the proper facts and do a full analysis. For instance, your question makes me want to ask if father is just bringing your child to his parents once in awhile or constantly to the point they have become almost parents themselves. I'd like to know if there is already a custody order through the courts. Just to answer your question simply, it is "no, unless they are harmful to your child and you can convince a judge." Father has every right to have extended family in his child's life--same as you do.