I am not 100% sure about Lola beeing at the origin of all of the spiciest nights. What transpired from the translations of what Rebecca said, Dima was the one who set the mood of the party on the Megan night and the night before at b1, then things kicked off as a private thing between Rebecca and Megan. Lola was not very active (and more of a cockblock than anything, although she was rightfully worried about unprotected sex between Dima and Anna).
As for the night of the bedsheets, I honestly don't know whose idea it was.
What is true however, is that for most of the girls, whatever "bi" attraction or curiosity they have is centered on Lola. Stella and Carolina clearly want her, as did Anna. The only exception might be Belle, who clearly wants Lola too but is not so exclusive, but unfortunately, none of the girls (not counting Milena) is interested ... Outside of thosee nights, Lola is already the center, with all the girls fighting for her attention.
During the bedsheets night, of course the girls kissed and touched each other, but only in Lola's presence and while waiting for their turn to get the queen' s attention. Stella and Carolina did nothing during their alone night, Belle and Stella did nothing when Lola and Carolina where on the balcony.
Tldr : I am not sure that Lola is the organizator of the hottest nights, and I think she is not, but all the other girls did take part in the parties only because they hoped to bang her. Thus, I am not sure anything will happen after she leaves.