DLsite：https://www.dlsite.com/maniax/work/=/product_id/RJ01054070.html
自購上傳

(同人誌) [Blood moon (ガスマス)] キメセクマタニティ (オリジナル) [DL版]

Base +6, kokomero +5

"Cheating" tag warranted, "Rape" tag unwarranted, it is a sort-of-consensual orgy; horny pregnant housewife procures a secret maternity clinic that doesn't do the regular check-up one expect at a real maternity clinic, her neighbor, and also pregnant housewife, wonders why her husband isn't accompanying her to the clinic, she excuses herself by being dodgy, gotta keep it a secret. At said "clinic" both neighbors meet and find out they have same secret check-ups at the unusual maternity to satisfy their needs, bonding in their debauchery.

Base +7, Fofotron +6

https://www.pixiv.net/artworks/108290001

Base +62

Just that cover made me cum.

Base +15

Read it more carefully. They're both single. The main girl reveals it in the bottom left panel of the first page, and she receives confirmation that the neighbor is the same on the right hand side of the last page. They just act like they're married because it's not really socially acceptable to tell everyone they got pregnant by going to orgies. As such, the cheating tag is not warranted. Also, that's not any sort of clinic. It's just a bar where they have rooms set aside for orgies.

Base +7, agehaTL +6

Drug, maybe mind control
either way fuck you mods

Base +4