http://www.stripgamecentral.com/tag/heidi
http://eveningnudes.pyronia.com/tag/heidi/
http://www.stripgamecentral.com/wp-content/gallery/strip-tickle-30-03-2014/tickle-30-3-14b.jpg
http://www.stripgamecentral.com/wp-content/gallery/strip-tickle-30-03-2014/tickle-30-3-14f.jpg
Other girl is.
http://www.stripgamecentral.com/tag/jasmine
Sorry I can't help you with the black hair girl but i know that the blonde girl is Lea Tyron(MetArt). You also can find her as Judit.