How far?

How far would you go to protect your kids? My friend K wrote about protecting her kids. It made me think about how far I would go. I am completely inlove with my kids :) they make me smile just thinking about them. The reality is i cannot protect them from everything but will do everything in power to try. I will try protect them from emotional and physical hurt. I have a hard decision to make do i allow my children to go to their fathers wedding or keep them home? Do i let them get angry with me now for reasons they will understand later or do i let them go and be here for them when they get back? The kids had a very hard time while they were with their dad. They are not used to seeing with anyone but me. They are still so young when do i let them go? I dont agree with this wedding at all. They were togther before i even filed for divorce and her age really bothers me! What if Mia were to come home at 18 with a 37 yr old? I must say God has blessed me with an amazing life, family and friends! Without them i am not sure i would know how to handle any of this! So do i let them go?