My Sister in law just tried to feed my baby red wine last night at our CNY reunion dinner. She said it's custom to feed 1 month old baby a little wine. I think she's nuts. Is this true?

Don't know where she heard that from, but regardless - nothing should be fed to LO (other than formula/breast milk) until around 6 months old! Do keep your distance from her if possible, especially in future just in case.