You've got 3 or 4 weeks, I can't keep straight when you and Orich go to your weekends. So, until then, I think you should treat her like a new girlfriend who you just started having this sexual affair with. Fun, light, playful, sexy. You could buy her that maid's costume at Victoria's Secret, and ask her to dust the bedroom in it, for example. Or some other little tidbit at Victoria's Secret or Frederick's that turns you on. don't get raunchy with it, but something that involves little gifts for her can't be bad - candles, massage oil, lingerie, perfume...
