The power of Zeus doesn't really care about morals, just the desire to have everything.
If there was a beautiful woman, even if that woman had a certain status that made him not supposed to have desires for her, Zeus' power still encouraged that desire.
This was certainly not David's fault, but it was the fault of Evelyn's madness.
David no longer thought about Evelyn's answer to his question. He didn't need to find out how Jane would react if she knew he and her mother were almost cuddling in this place. This was something Jane must not know.
"A little bit of madness is in me, but what's happening right now is not madness, it's personal interest," Evelyn replied very casually, smiling charmingly.
In fact, Owen was watching David and Evelyn from the pool area.
Even he was having trouble breathing because of the sight.