This summer DP's ex moved - she now lives 90 mins away by car/train. Since her move we have had both SSs with us during the university hols. SS1 is now back but SS2 doesn't start until beg October.
SS2 was supposed to be spending a fortnight with his mother. He left today but is coming back this Saturday (this is to fit in with her plans).
SS2 is 21 and so there is not much we can say / do. I just find it frustrating that DPs ex can just give up any responsibility for SSs over the summer. I wondered what others do.