https://www.dlsite.com/comic/work/=/product_id/BJ275154.html
https://coolmic.me/titles/2698 (English)
As always, please support the artist and buy his works.

NTR in the Hot Springs

Cover - F.S
004 - Period (?) / ぴりおど ............................................................ ｢ー泊二日寝取られ温泉の旅｣
026 - Kanou Aira / 嘉納あいら ............................................................ ｢魅惑の混浴温泉｣
044 - Uyuu / 烏有 ............................................................ ｢混浴温泉に妻を一人残してはいけない｣
058 - Tokita Monta / 刻田門大 ............................................................ ｢枕サービス｣
068 - Himenogami Kinta / 姫ノ神金太 ............................................................ ｢夫と温泉と元力しと｣
084 - A4 (?) / エーヨン ............................................................ ｢混浴の嗜み｣
096 - Rakuji Tarahi / 楽時たらひ ............................................................ ｢疼き｣
114 - Kuroseimu / クロセイム ............................................................ ｢オモイデヅクリ｣
Note: I'm not sure about the title.
Credits to @Pokom for this list

1-A couple's only hot spring getaway turned out to be my bored husband's proposal for a cuckolding experience!?
2-In an attempt to dip in a mixed open-air bath with my husband, I ran into my ex-boyfriend!? /
3-On a fertility hot spring trip, I ended up being embraced by a stranger...!? /
4-A special option from the masseur to a solo-traveling wife!? /
5-An encounter with my ex-boyfriend on our trip leaves me getting sought after when my husband is not around!? /
6-Seeking advice from a stranger in an open-air bath where my husband didn't come!? /
7-Ever since running into my ex during our trip, my body's been aching with desire!? /
8-A trainee from overseas seeking memories leading to something irresistible!? To think I'd end up not needing my husband...

Japanese RAW: https://e-hentai.org/g/2006377/e1192162fc/

Wow man! Since 2021, I honestly didn't think I would ever see this translated, thanks.

Base +15, Fofotron +17

"What can I do to spice up my marital sex life?"

*snaps fingers

"Get other men to fuck my wife! I'm a genius!"

Was that the first choice? XD

Base +15, Quflow +7

Hitozuma Yukemuri NTR Anthology Comic
人妻湯けむりNTRアンソロジーコミック
Married Woman Steamy NTR Anthology Comic

Cover by F.S (do not tag!)

004 - Period / ぴりおど ............................................................ ｢ー泊二日寝取られ温泉の旅｣
026 - Kanou Aira / 嘉納あいら ............................................................ ｢魅惑の混浴温泉｣
044 - Uyuu / 烏有 ............................................................ ｢混浴温泉に妻を一人残してはいけない｣
058 - Tokita Monta / 刻田門大 ............................................................ ｢枕サービス｣
068 - Himenogami Kinta / 姫ノ神金太 ............................................................ ｢夫と温泉と元力しと｣
084 - A4 / エーヨン ............................................................ ｢混浴の嗜み｣
096 - Rakuji Tarahi / 楽時たらひ ............................................................ ｢疼き｣
114 - Kuroseimu / クロセイム ............................................................ ｢オモイデヅクリ｣

Base +11, Fofotron +17, tontoman +6, Bane13 +59

@moximoore

And then surprised Pikachu face when wife doesn't wanna stop "spicing it up"

Base +6