You only have sex once a week, tips for spicing it up?

Wife has crazy low libido, I have crazy high. She's literally said that she wouldn't mind never having sex again. I want sex multiple times a day...

She's agreed to do it once a week for me/us, which is good, however our sex is the exact same every time, any tips on getting things a bit spicier? Please try be realistic, this woman is not going to let me tie her up...