WEARING SAREE LOW WAIST?

My age is 48+ and I like to wear saree all the time. I generally wears my saree above the waist.My son works in a multinational company.On 5th April is my birthday. Yesterday, my son presented me a yellow colour ciffon saree and told to wear it on my bithhday. He requested me to wear it extremely below the navel with a yellow colour sleveless bra . At night when he comes from office he want me to wear the saree which he presented. I donot say anything to my son. The question is the saree which he presented is very very transparent and since he told to wear it with only with a sleeveless bra ,it will display a lot of my body, specially my big navel.I know that my son has requested me only for one day ,but is it okey ,to show off my navel and wear saree like he wants in front of my own son?