https://www.dlsite.com/maniax/work/=/product_id/RJ312843.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_194092/

>Part-time worker Naomi has recently started dressing up for work.
>Her husband suspects this and sets up a hidden camera at home.
>What was caught on film was an affair with his wife's co-worker, Taiki.
>Naomi, feeling guilty and immoral towards her husband, suppresses her desires, but she is unable to resist Taiki's cock.
>The last time she allowed him to insert himself into her, she became pregnant.

Base +13

The husband is conflicted. He's pissed off that she's cheating on him but is turned on by how wild she is while fucking Taiki. The last scene is Naomi telling her husband that they should have a baby as a way to justify her cheating and the fact that she's pregnant and can pass off Taiki's kid as his.

Base +6