Contrary to the fables and myths of romance in our culture.. if someone says no or not now or I don't think so that doesn't mean try harder to get them to say yes....trying to motivate someone to be intimate is a product of the coercive mindset. A mindset that creates trauma for those on the receiving end.
If your sleeping beauty or Snow White is sleepy or asleep she doesn't need you to kiss her to wake her up she needs you to let her sleep so that she can feel functional during her day ..
If you can learn to resist the urge to pressure your partner for intimacy.. I promise the intimacy you will have together will be far far more meaningful and pleasurable for both of you.
True intimacy comes without anyone being convinced, guilted or pressured.