Wedding and fiances kids

My fiancé and I have been together for almost 5 years. We are getting married In march of next year. He has two boys who I love but who are very active and only listen to him. I at least want my fiancés full focus and attention for part of the wedding so I am fine with the boys being there for the ceremony and the first two hours of the reception but was wondering if you guys thought is was wrong of me to ask that they leave at 9:00 so that my fiancé and I can enjoy the last few hours of the reception child free or if you have any ideas for what we could do so that he doesn't have to constantly have his attention/eyes on them to see if they are sitting/listening and not being crazy. via /r/weddingplanning http://ift.tt/2v4ZEfq