From the top of the Sky Tower, they could see how the people were continuing to enjoy the party in the garden.
From the top of the Sky Tower, they could see how the kingdom was enveloped in a peaceful atmosphere tonight.
From the top of the Sky Tower, they could continue to talk in private without anyone interrupting them.
It was not that people really bothered them because, oddly enough, those people were able to quickly come to terms with their relationship which was considered taboo in this era. Both of them probably didn't expect that acceptance would so easily fall to them, but who wouldn't feel happy after receiving it?
Maybe they expected the worst, and that was why they looked so relieved to find out that people weren't against their relationship.