CeMar, I am very ticklish and being tickled can be very annoying. My breasts are very sensitive and are very much errogenous zones for me, but not if I'm not aroused first.
Take notice of your W's reactions and don't necessarily take it as 100% rejection. She probably just doesn't like her breasts fondled out of the blue.
"Happiness is a butterfly, which, when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you."