My mom & dad go to Boston quite often to visit with Colin. They check his duty schedule and plan around that. He doesn't take leave time, he either knows they'll be getting early liberty or they just go out for dinner and spend a couple of hours chatting and its actually very nice. Now if you want her to take days off to show you around and spend all the time with you, which is perfectly fine, like Wep said, she'll have to wait to accumulate some leave time. Colin took 5 days off when I went to visit him but he was at the ship for almost a year when I finally got there.