Not sure if your Japanese is just bad, you have reading comprehension issues, or you simply donāt know what the word "slut" actually means.
She worked as a hostess before marriage strictly to help her husband (then-boyfriend) financially. When she agreed to go out with that guy, it was supposed to be just dinner, but she was pressured into drinking and got completely wasted. She never had any intention of cheating. She only got pregnant because she was assaulted while heavily intoxicated. All the money she made was strictly from hostess workāno sex work involved whatsoever. Her complying with him now is purely due to blackmail, just to protect the secret and keep her happy family from falling apart. Aside from that assault in the past, she has never once cheated on her husband.
From start to finish, nothing she did was driven by selfish desires or lust. Calling her a "slut" makes zero sense.š¤·š¤·