This is definitely a real syndrome. It is the first thing to check for on finding a twin pregnancy. The lie is that that nothing could be done to save the lives of the twins or if the one twin had a condition incompatible with life & the shunt was killing the other twin that the law would prevent treatment, even if that treatment ended the life of the incurably affected twin.
https://www.hopkinsmedicine.org/health/conditions-and-diseases/twintotwin-transfusion-syndrome-ttts
You know if it were me I’d do everything I could to save both babies. Even induce labor early as possible and have the babies in an incubator if that meant saving their life. I can’t kill one to save the other.
This was 16 years ago. Was this procedure available then?