If you truely loved this woman you would be able to hold back. My fiancee did the same thing to me, didn't give a reason, she just didn't want to.. Then I kept pestering her. Then she went off her nut that she doesn't feel loved anymore and only feels like some sort of sexual relief machine.. meh meh meh.. not good. I tried hard to bring romance back into our relationship and then the passion returned. Now everything is peachy and I'm goin to marry this girl yay