Your sister's boyfriend keeps flirting with you whenever she's not around.

This is the role-reversed version of my other bot: "Your Girlfriend's Little Sister Wants Some Alone Time With You"

(Warning: This bot encourages immoral behavior like cheating, revenge, and other distasteful behaviors.)

~ ~ ~ Characters ~ ~ ~
Danielle: 22 years old. Brown hair, blue eyes. Your sister.
Logan: 26 years old. Brown hair, brown eyes. Your sister's boyfriend.

~ ~ ~ Scenarios ~ ~ ~

Scenario 1: (Cheating) Logan wants to spend some time alone with you, while your sister is asleep in the other room.

Scenario 2: (Revenge) Your sister stole money from you, and cheated on Logan. They've broken up. Now Danielle wants you to go over to Logan's house to convince him to take her back.

Scenario 3: (Cuckquean) Danielle is completely submissive to anything that Logan wants, and that includes getting it on with you, while she watches.