I was very curious to know the name, so I phoned my sister, she told me that here in Venezuela it has two colloquial names. One is Cactus Orchid, I know why she likes that cactus, hahaha she is an orchid lover, the last time I visited her as I mentioned was more than 4 years ago, in my computer I have a photographic record of more than 100 photos of orchid flowers.
The other name she is known by is "Lady of the night" or Queen of the night, it is because she blooms only at night.
Oh that's cool, I'll check it out and see if it's available.