Showing skin while wearing a sari

Not really.

The “original/traditional” way to wear a saree was without a blouse, often casually exposing your bosom and upper body. Blouses only came into fashion after British memsahibs arrived in India, and wealthy local women started copying their fashion trends. “Original” blouses look much like the Victorian era blouses worn by British women at the time, with high collars, puffy sleeves, lace trimming, and no exposed midriff to speak of.