I had been in the apartment all day in pantyhose and penis cage. Then the news came – could come to you now and my bladder is full. So I put on the stocking mask and put on clamps for my nipples and waited for grandma. Naked in the bathroom she stood over me and apparently had inhibitions about urinating. There were only a few small drops of piss that tasted very salty. Unfortunately, the big beam of her hot pee failed to materialize – and that despite the supposedly full bladder. Embarrassing – for me a different humiliation.