This is one of those cases where there are two hostas with the same name. One is registered and, therefore, the "official" version of H. 'Temptress' while the other is a non-registered plant and needs to be renamed to avoid further confusion.

Registered by Gerry Hicks of Maine in 2017, is a fast growing, large size (18 inches high by 30 inches wide) sport of H. 'Striptease'. The leaves are yellow with a dark green marginal variegation that includes a thin white stripe on the inside of the green. They are ovate, slightly cupped, wavy and dull on top. Pale lavender flowers with darker lavender stripes bloom from mid-July into August on scapes up to 36 inches tall. 

The registration materials state: "...Same habit and color as parent but, unlike parent it emerges fully colored...enter lightens to creamy white and the white stripe disappears."

Hosta Helper will call this plant 'Temptress' (Hicks)

Originated by Stuart Asch of Michigan, this non-registered cultivar is of unidentified parentage. It is a large size hosta with green foliage that has creamy yellow to white streaked variegation. The broadly ovate leaves are slightly wavy and slightly folded. It bears its flowers on very tall scapes followed by seeds.

Hosta Helper will call this plant 'Temptress' (Asch)