Cheating is more accepted in Asian countries though, it's kind of a cultural thing. As long as it's just sexual and not platonic. I guess it has with that it's okay if someone fullfills their urges, but not okay if they leave the other one and they end up in financial troubles because of that.
Sorry, I can't tell which of the two you think was the original line.
This should have been translated as "When my husband's reading NTR manga" or, more accurately, "When my husband reads NTR manga" as it is not in the perfect tense.
Ah, I missed the た.
読んで時 isn't even grammatically correct. You're thinking of 読んでる時. Present-tense verbs usually end with る from what I've gathered. 読んで would usually be some kind of command to read. Though I agree I probably haven't gotten the exact nuance of what she means.
And right in the next chapter, I missed the って, which turned mom's line from her own thoughts to a quote from dad!
