She should be all right to let off lead now, you may want to give her a good bath to get rid of any lingering smells. Even if she attracts some males, she shouldn't be interested in them at this point and will tell them off in no uncertain terms!
The true gauge is
her level of interest, not the boys
(and rape is almost unheard of in dogs, most females are well capable of taking care of themselves. If a female gets bred, it is because
she allowed it
)