Here are two paintings by Edwin Longsden Long in which he uses the same pose, and probably the same model. The group painting is titled Love's Labours Lost, the portrait is titled Ready for the Bath.
Biography at the Art Renewal Center.
And more art at Painterlog.com
Paintings from the Reign of Victoria: The Royal Holloway Collection, London
Temptress: From the Original Bad Girls to Women on Top