“Night showers”

I only feel comfortable posting this here because I don’t know if people will think I’m bashing SW when I say this but I don’t understand the “he knows when I take a night shower that I want sex.” ?? They had been together 8 years and she birthed 2 children with him. I was with someone for 7 years with no kids and would just straight up tell him I wanted sex, or just make the first move myself. Clear and direct, like I didn’t have to send signals that I wanted sex. Was this normal for them or was it because the relationship was severely strained?? Does anyone have any information about their relationship before the affair and before NC? -I guess I’m trying to understand if their communication issues went so deep that it even detrimentally affected their sex life, and if this was a symptom of the affair/relationship deteriorating or if this is just another thing that LED do the relationship deteriorating/affair