If you plan on asking your spouse for a divorce, it's safe to assume that your marriage is already on the rocks. For this reason, you have every right to have concerns about what will happen when you finally muster up enough courage to bring this topic to light.
Does your child's other parent undermine you?
Developing your parenting style and values is difficult under any circumstances, but dealing with a co-parent who undermines your relationship with your child is exceptionally hard. Often, this behavior is simply something that you must overcome or ignore, but not if your co-parent's behavior violates your rights.