That's a nice one, Silken! Definitely worth growing. How tall do the canes get and is it fragrant?
In my limited experience with this group of Dens, restriction of water isn't as important as cooler temps for making blooms. Drafty windows and semi-heated spaces, coupled with strong SW light and no or very light fertilizer, have given me my best results so far.
I don't keep mine particularly dry throughout the winter, though watering drops off some with cooler temps. I try to follow the plant's cues and water enough to keep canes from shriveling and in some cases leaves from dropping off. Ones that quickly go deciduous in cooler temps get less water, and the ones that keep their leaves a bit more. Definitely don't be afraid to fiddle with conditions, these plants are tough and seem tolerant of a wide range of growing conditions.
Pretty cool that the keiki is blooming already. Feel free to send it my way if it needs a home away from its mother plant someday.
--Nat