I'm afraid I don't have good news for you.
Althought you are right that the man is the head and your there parent, but since you are an 'apostate' then you are evil, from the devil, bad, no good, etc..etc.. so you are not worthy of the truth so its OK for them to lie to yuo, this is what the WTS will teach your kids. sorry.
What i would do if I was you, depending on their age, I will reasom will them on their false theology and they will slowly see for themselves that the WTS is wrong, if you try and use force, it will make the WTS look correct about you.
Be as a good parent as you can and they will see that you aren't evil. And even tell them that you know what and where they've being but never get angry, just nicely tell them that your disappontted with them, so if they still have a conscience they will see that they've done wrong to you.