What does "modestly" mean to your neighbours? In the Victorian era, it was immodest for a lady to expose her ankles. Up through the 1950s, it was immodest for a woman to expose her stomach, then the bikini came along. (I'm old enough to remember "itsy-bitsy teeny-weeny yellow polka-dot bikini"; you youngsters should check it out, it will give you an idea of what a previous era was like.)

For the last 26 years, Canadian law has actually been less restrictive than social custom; women are legally permitted to publicly expose their breasts, but most Canadian women still consider it immodest to do so.  In short, we get back to my point; "modestly" means whatever the individual thinks it means.