Should I dig up my cat?

Two days ago I had to put down my cherished 13yr old cat. It was heartbreaking. We buried her in the back garden. The problem now is my other cat, her sister, is searching for her. I didn't show her the body and now I'm regretting it and actually thinking to dig her up and show her the body. My cat that died was lying in the cat basket covered in a blanket as we dug the grave and my other cat did come and sniff a bit and the other day she was actually at her grave for ten minutes, but she is still searching. It really is unbearably sad. They were very close. Should I show her the body? I am 35 and can handle it even though I will do my best not to look. Will the body be in a bad way after two or three days in the ground? Help please!