I know quite a few high school sweethearts still happily together today. It's STILL statistically more likely to end in divorce. You knowing some happy stories doesn't change actual statistics. Regardless, she's about to have a baby without her mother/family around to support her. All while surrounded by some dude she's only known a year and his family that she probably hasn't actually met before. In-laws tend to be nightmares to new moms (they're not actually married yet either but that's somewhat irrelevant at this point). She's not in her own home and is in a new town. The whole situation has the potential to be incredibly difficult on her. It's not going "doom and gloom" to just be realistic and know life's possibilities. Everything could also go sunshine and rainbows for her. Discussing possible negative outcomes won't sway that, but it does help prepare people for life's challenges. Anyway, I didn't mention it to throw shade at her daughter. More to say "hey, your kid *might* need you soon. So just be there for her and deal with the distance when the time comes".