My ex was so secretive that she lied about everything. So, back then I searched and found a technique probably on some forum(search result only yield r/theredpill and mpua), that I can't remember. It will be very nice if anyone remembers the technique. Here is the gist of that technique that I remember: During sex, ask her what you want to know. If she denies it, slow down a little. Ask her again. The complete thing is to push/pull. Push to get her crazy, then pull if she resists. It's the same thing as breaking LMR. Sorry, for my bad English.