I love these pics. At first she has a **** shoved in her mouth and she looks unprepared. Kind of silly looking. Then she seems to playfully bite on it in retaliation... then decides to be sweet and love on it with her mouth. Oh Silvia...
She looks similar, but I don't think she is Laetitia. This BTS set "CoolContent Session Backstage" (no. 277 on clubsilviasaint.net, see http://web.archive.org/web/20050731002321/http://clubsilviasaint.net/v3/index.php ) was published on 2005-07-20. But Laetitia https://www.iafd.com/person.rme/perfid=laetitia09/gender=f/laetitia.htm was born on 1988-01-30, so she would have been underage in 2005.
But if everything else fails we could ask martiner. He should have been the photographer, after all.
I found her. She is Zdenka V aka Alexandra aka Joanna Timson aka Nanci L aka Valenica https://www.indexxx.com/m/zdenka . She has the same large areolae. According to https://www.thenude.eu/Zdenka_1455.htm#Bio she is not Czech or Slovakian like most of martiner's models, but from Poland.