<human>: Well she has two kids, a boy and a girl -8 and 10 years old, respectively. Her ex lives overseas, and hasn't seen the kids in 7 years. The girl is 10 and thinks about her dad alot. 

Well the kids mom said the only way Mr. Ex can see them is to come to our state and go to court to get visitation rights.  But this just won't happen, the guy  is way too proud(and 10 years her senior). 

He would only agree to see his kids in his home-state(Oregon) and maybe I'd chaperone the kids.  Which would seem OK except my sister thinks somehow the guy will kidnap them, or that this visitation would void the custody agreement. 

But beyond all this legal stuff, isn't it a good idea for the kids to see their dad? Like on a psychological level? But what if he only sees/talks to them once every year? Would it be better to have no presence than an occasional one?

Could you distill the essence of the text into 1-3 sentences?
<bot>: My sister is divorced and not helping the kids to see their dad. I'm worried about my niece having daddy issues because she's the type...