How could Adam not understand this? Her emotions were literally at his fingertips, and he was aware of the feelings of a woman who was alone and not receiving the attention and love she needed. For some reason, this was a common sight.
He had already seen this situation with Shizuya, who showed affection for her husband and remained loyal to him, but he simply ignored her feelings, wanting to indulge in gambling and frequenting brothels to satisfy his desires. It was disgusting on his part.
Adam sincerely didn't understand such people. Most of them lived very little (by demon standards). They wouldn't even have time to get bored because their lives were very short. But they preferred to spend their time indulging their lust.
Not that Adam saw anything wrong with it, as he was a demon and believed that the most important thing in life was to seek pleasure. However, if you were already married, at the very least, show attention to your woman.