From what I read from the novel, it's still not too develop, but it seems like Ajira's thot immunity is really effective since Sheryl usually able to seduce others with her charm easily. She gets the satisfaction whether she is able to gain Ajira trust or makes Ajira listen to some of her small request(I won't spoil this, but it will cute). She will be alot more aggressive to Ajira in the future in fluffier manner and abit dirty mind. I can say for sure that she is interested in him, but can't be quite sure to call it love yet.