So, did Lucy get boned by that one guy?

Yes, she slept with him in her London apartment, presumably to prostitute her way into him chosing her to be his girl Friday over the other applicants. However she seemed to be repulsed by him and the moment they got to the island she shunned his lecherous attentions aside from maybe one time when she again used sex to keep him from going off to Badu, the neighbouring island.

Sitting on the fence gives you splinters on your arse

In the book she wrote they did have sex during the year on the island i recall she dressed up for him g was madly in love with her

Oh and she didn't sleep with either of the Australian men out of a misguided sense of loyalty to Gerald. She and Gerald argue about it.

"These days you have to boil someone before you can sleep with them"