Greetings from another Iowan! I am on the western half of the state...
So glad you went and filed and are taking actions. It is bad enough to be out looking for fun but to do it with your sister (I know she isn't really interested, but HE doesn't) is disgusting.
One thing I will say is, can you have someone with you when he gets served? I am concerned that he could get violent. He thinks he has you right where he wants you and when he finds out he was tricked by someone he thought he could 'control', he may lose it...Be careful