My advice that could save your marriage (take it from a married man to a Polish woman): STOP talking to her about sex. Stop acting like you need sex from her. Let her think you date other women, don't even be flirtatious with her. Ignore her games. It may take a month or so, but do not mention or ask her for sex at all. You'll see that her attitude will change if you stick to my advice. Good luck and thank me later.