Losing virginity

Angel realized a significant issue towards. 

She became aware that Sam and Ava were not related by blood. 

What did this imply? It implied a lot; it meant that even if something sexual happened between them, it wouldn't be deemed as unacceptable.

In the open-minded game world, many bizarre things gradually became acceptable. And in the eyes of a woman like Angel, so-called ethics and morals weren't unbreakable; people often breached them for personal gain.

Why is this? Ultimately, it's because humans have an innate desire to touch the forbidden and many have found that breaking moral boundaries often leads to great success.

This isn't a positive phenomenon, but it doesn't affect Angel's perspective. Especially when she saw the way Ava looked at Sam and her instinctive hostility towards Angel.

Was it simply a sister's instinct to protect her brother? Was it all about familial concern?