In all four houses...

Dobby decided how to do this. He and his servants would write letters for the ladies who would become wives of the Great Harry Potter, to help them understand what they should be doing. He would also explain things to the Great Harry Potter. He had learned things on how the ring Missus Hedwig gave him works. For letters, he didn't need to write out the full thing. He just had to sign with his name, and people would agree with the letter or anything else written. To agree with what it said.

"Missus Cissy and Missus Belle will write messages for Dobby to help the Great Harry Potter get his wives. If you are good, you can be the Great Harry Potter's sex slaves." he told the former Narcissa Malfoy and Bellatrix LeStrange. After long conversations for the House Elf as the male Deatheaters met their fates, the two of them were now devoted to Harry Potter as was Dobby, save for a sexual element towards the eighteen year old Dobby didn't have.

"What do we have to write, Master Dobby?"asked the dark haired sister, who had been re-educated by the elf.

"Tell us how to take our rightful and deserved place as the Great Harry Potter's slaves?" asked the blond haired woman, who had been treated the same way as her sister.

"Listen to Dobby, we will make sure the letters are right." said Dobby as he tried to figure out the right way to set it up to get what he wants. The Letter were soon written and said...