The Greengrass Betrothal

Harry isn't brought to his aunt and uncle, but instead a house elf brings him to the Greengrass family. A betrothal was made before the death of Lily and James that stated that Harry would marry both Greengrass sisters. Brought up in a Wizarding family and knowing of most things in the Wizarding world, how will the rest of the Wizarding world feel? Not immediate lemons. Slow Update