It was at this moment she knew... she fucked up.

Base +11, Vivi1993 +22, SourBoutLife +12, MonsterBot07 +6, nemo_adams +10, 5pect1er +6, ABDC +6, palotz +6, kai64 +6, K81f +6

I added male:cheating and downvoted female:cheating. The sister's husband is dead.

Base +6, Echoside +6, wootwoot123 +6, Forgunia +15, Anontranslatorguy -1, MissMeWithThatPanda +6, FrogxDor +9, palotz +6, Anonyslime +8, GigantRegis +7, saturnine +7, snakutarus +7, MarklesMcReedleston +6, and 2 more...

Page 15:

-CHAD MODE: ACTIVATED-

Base +15, strayblue +9, Anonyslime +8, rockingoldensamurai +7

surely there is a sequel

Base +7

What a horrendously bad translation

Base +6, wootwoot123 +6, nemo_adams +10, rawrmon +6, Jesu Christo +16, Vivi1993 +22, Forgunia +15, flash11 +27, Anontranslatorguy -1, Jago Smith +8, rarog +6, jessica702 +12, Friday13th +6, and 16 more...

is the husband implying the wife enjoys being a hotwife?

Base +6

Dear Anontranslatorguy,

If you did the translation for yourself, clearly there would have been no need to upload it to EH.
I would prefer that you left future works you're planning on uploading to be commissioned to translators that will do a better job.

Yours sincerely,
CHT

Base +9, flash11 +27, Anontranslatorguy -1, rarog +6, jessica702 +12, Friday13th +6, Fofotron +15, 2xyu +7, anonymousMember +6, ABDC +6, DaiyaO +12, fredfredricson +10, carbsman -7, and 10 more...

Hope someone who actually speaks english translates this one someday.

Base +6, Fofotron +15, xd464 +6, 44inf +6, MistaBiggles +6, rockingoldensamurai +7, sgc_geh +12, K81f +6

At the point where the phone falls and she can't hear anything... honestly, do you NEED to hear anything else at that point? What she did hear was pretty conclusive. If she can't figure out what happened after that... she was probably silly enough to suggest this arrangement in the first place.
Oh wait.

Base +21