Can my mother stop me from seeing my Father.

NO. Not only doesn't your mom have the right to stop you from seeing your dad, it is her JOB as a mother to foster a healthy relationship between you and your father- and court cases say so.  Your mother may have full custody, but unless there's something you're not telling me, there is a court order that gives your father visitation rights with you and your siblings. If your mother prevents you from seeing him, she is in violation of that court order.  Your mother is not allowed to use you as a weapon in her fights with your father, because that is emotionally harmful to YOU- and is considered parental interference, which could be grounds for taking away custody from your mother and giving it to your father. (In which case he wouldn't have to pay her child support- she might have to pay HIM.) Your father is the one who needs to tell your mother to stop using you and your siblings as pawns, and threaten to take her to court for violating the visitation order or even for a change of custody if she doesn't allow you to see him.  YOU should not threaten your mother with this- it's not your job. Your father shouldn't be putting you in the middle of this with his passivity. This is HIS fight. You want to see your dad, he wants to see you- just go see him.  Let your father handle your mother, and protect you from the fallout.  Feel free to show your parents your question and my response to your question, if you like.  They should know how you feel, what they should be doing/not doing to keep you out of their fights, that they should be encouraging you and your siblings to spend time with both parents, and the consequences (especially for your mother) if they don't.