The brother's efforts may lose their effectiveness, if the sister tells him to get lost or otherwise actively ruins his attempts to prevent the boyfriend from dating her.
Miscellaneous resource numbers: Addiction and Abuse 24-hour Hot Line 1-800-777-2721 Alcohol/Drug Abuse Hotline 1-800-662-4357 Phone: (406) 638-2847 Deering Community Health Center-Yellowstone County Health Dept. DSVS also provides education and outreach with schools and civic organizations focusing on domestic violence, sexual assault, date rape, teen dating violence, primary prevention of domestic and sexual violence; professional in-service training for the medical community, social workers, clergy, therapists and the business community; volunteer advocate training; speaker's bureau training; media training; consultation and referral for community professionals. Bureau of Indian Affairs Address: Crow Agency, MT 59022 Phone: Emergency: 9-1-1 Non-emergency: (406) 638-2631 Carbon County Bridger Police Department Address: P. Box 368, Bridger, MT 59014 Phone: Emergency: 9-1-1 Non-emergency: (406) 662-3116 Services: Provides law enforcement for primarily Bridger city residents. Provide referrals for victims of domestic violence to services such as Healing Hearts and safe houses.
This may lead to the brother trying to save face with If You Ever Do Anything to Hurt Her... It's Truth in Television, as most any guy with a sister can tell you.
While the title says "sister," variations of it also include mothers and other female relatives (such as cousins), and for girls this would most likely be "My is Off-Limits." This doesn't include daughters, because Overprotective Dad already covers that. This may also be a symptom of a character having a Big Brother Instinct. Also, this trope is almost indispensable for any Brother Sister Incest works, where it builds the initial Incest Subtext in story.
Address: 123 South 27th Street, Billings, MT 59101 Phone: (406) 247-3350 Hours: 8 a.m.-5 p.m. Rosebud County Sheriff’s Office Address: 180 13th Ave S, Forsyth, MT 59327 Phone: Emergency: 9-1-1 Non-emergency: (406) 356-2715 Services: Provides law enforcement for residents of Rosebud County. Box 729, Columbus, MT 59019 Phone: Emergency: 9-1-1 Non-emergency: (406) 322-5326 Services: Provides law enforcement for residents of Stillwater County.
Stillwater County Columbus Police Department Address: P. Box 549, Columbus, MT 59019 Phone: Emergency: 9-1-1 Non-emergency: (406) 322-5313 Services: Provides law enforcement for primarily Columbus city residents. Sweet Grass County Sweet Grass County Sheriff’s Office Address: P. Box 567, 200 West 1st Avenue, Big Timber, MT 59011 Phone: Emergency: 9-1-1 Non-emergency: (406) 932-5143 Services: Provides law enforcement for residents of Sweet Grass County.