Unlike the Lyvarian palace and travelling on the road, Evanna and Arawn found themselves bound by societal norms and regulations. It was customary for men and women to socialise with one another in crowded settings with chaperones. That never stopped those from breaking the rules before. It certainly didn't dissuade Evanna or Arawn either.
In the middle of the night, Arawn would stealthily climb into Evanna's chambers, all so they could converse secretly, kiss and cuddle. The thrill and excitement of possibly getting caught heightened Evanna's desire to give her all to Arawn. Surprisingly, or not so surprisingly, Arawn never caved, and after cuddling all night, he was gone in the morning before anyone would discover he'd visited her chambers.