Hugging can be viewed differently if someone has insecurities, just saying from experience not everyone can hold their emotions and act with a clear mind when this kind of things happens.
I'm gay and the guy who kissed me everyday and said I love you as well while we were dating cheated on me with a girl. It made lock my heart for a long time, even now I block anyone trying to approach me. I completely empathize with him acting like that ngl.
Maybe just try to think of them as Gods taking up the form of humans? They were originally dragons in the heavenly realms remember?
Usually in Gods family trees incest are pretty common so it's kinda normal between their kind and again they aren't fully human anyways so idt our norms should be applicated to them
The hood gave me PLL vibes lmao