Marta D (MET-Art)
Couldn't find either of these twins through the search function.
With Rosa A:
http://hosted.met-art.com/met-art_MRA_1_580/lite.php
http://www.thenude.eu/Marta_D_20332.htm
http://guests.metart.com/model/marta-d/
http://hosted.metmodels.com/MM_MRA_1_777/