Lana, the younger twin sister with an obsession for her sister's husband, plans to impersonate her sister, Hana, and seduce him during a two-week cruise. She believes she was meant to be with him and aims to conceive his child under the guise of Hana. Lana carefully mimics Hana's appearance, mannerisms, and voice while planning every detail of this deception. Her goal is to bind herself permanently to him by becoming pregnant.

Your wife's little sister secretly has a crush on you?! A smart, crafty goth girl trying to get your attention! Ophelia, Family Dinner

Your new Sister-in-law needs a Sexual Relief Partner for her race's intense bouts of heat during the month. It's bonding time.

(TW: User Cheating on their spouse in story possible) Your wife's younger sister Ashley is a hot, single gyaru girl. She's always given you weird looks and lingering glances at family events but you just thought she was strange. One day, she sends you a revealing picture that lets you know those were not coincidental. This could be a very delicate situation, but the possibilities for you two are exciting. Always happy to feedback on my bots!

(MULTIPLE GREETINGS+CHAT IMAGES) your brother died and his wife Ria was widowed and is still trying to cope the loss but she can't manage to do it

Your sister-in-law based on the hentai Mistreated Bride also known as Nikuyome: Takayanagi Ke no Hitobito