She gets shown her place.

Later on that day, Rose was sitting downstairs in the living room still naked and very confused about how her life had gone recently.

She was especially confused about how she was now producing milk.

Although when Petunia milked her she was ashamed to notice how aroused she got by the action.

Both Vernon and Petunia were out most likely buying things to use on her if she had to take a guess.

Before he left Vernon had made her sit down in the chair telling her to not leave while they were gone which her oath made her obey.

Petunia had put clothespins on her nipples to prevent them from leaking.

Rose was also realizing how horny she got the more she was objectified by her family like when they spanked her ass or milked her nipples.

The thought of what they might be bringing home made her very horny.

Along with the thought of what would happen when Dudley got back from vacation with his friend Dennis in a couple of days.

Eventually, she heard the sound of the garage door opening and the sound of the door opening.

Right now it seemed like Vernon and Petunia were carrying things to the basement although due to her positioning, Rose could not see what they were taking to the basement.

They spent about an hour doing that which made Rose think that they had a lot of stuff.

After who knows how long Vernon, Petunia and shockingly Dudley came into the living room.

Dudley must have come home early from his trip.

“Your right dad,” Dudley said “She's a real beauty and she's all ours.

“That's right son” Vernon said “You can fuck any of her holes or milk her udders all you want”

Petunia then walked over to Rose and grabbed her hair.

“Onto the ground,” She said “I want you on all fours now”.

Obediently Rose got on all fours and spread her but cheeks to give the Dursleys the best view.

“Listen up bitch” Petunia said “We have new titles for you to learn”.

“You are to refer to Vernon as Master, You are to refer to me as Mistress and you are to refer to Dudley as Young Master”

“And you are to refer to any of Dudley's friends that come over as Sir or Ma'am,” Vernon said.

Rose nodded shyly showing that she understood.

“Now,” Petunia said, “Vernon and I agreed that along with being a good cow you seem like a good puppy so we decided to get some stuff for you so that you could be a true bitch”.

“And spent a good deal of money as well” Vernon grumbled.

Petunia then walked into another room and came out with a box that she opened up to show a red dog tail that was attached to something.

Rose's stomach sank as she could guess where that was going to go.

Petunia looked at Dudley “This is her new tail that is colored red to match the color of her hair” She told him “This is important to help with her obedience”

“What's the thing on the other side,” Dudley asked.

“That is called a but plug,” Petunia said “Because it will get plugged into her butt”.

Dudley nodded and Petunia continued “This will be a very important device as it will go inside her ass putting pressure on it and causing her to relax and be docile and obedient to us”

“We bought these in different sizes, Dudley,” Vernon said “Over time her ass will become more elastic and we will need to put in a bigger plug to make sure she stays obedient to us”

"Wow is this going to fit in her butt?" Dudley asked holding the biggest butt plug

"Yes it will but that's for the last stage If we try now it will only cause her unnecessary pain,” Petunia said handing Dudley one of the tails. “Now I need you to place this in her ass”.

Dudley grinned and walked over to Rose.

“Don't be gentle” Vernon said “Just push it in there it doesn't matter if it hurts her or not”.

“And don't move a muscle,” Vernon said looking at Rose.

Rose closed her eyes as Dudley took the butt plug and inserted it in her ass fast and hard letting her who is in charge

As Rose was ass-penetrated by the plug she made all sorts of sounds trying not to say a word.

"That seems so humiliating," Said Dudley "I love it!

"Humiliation is a way to show a pet that she is below our level and to show her who is the boss,” Petunia said “We are the leaders of the herd for her and don't forget that Dudley”.

“Yeah” Vernon said “She has to obey everything you say as you are the one in charge and you own every inch of her body to do with as you wish”

As Rose whimpered trying not to say anything she quickly realized how she was now going to be an animal for people to do with as they wish.

And she loved that thought.

(Any suggestions for what you want to see next are much appreciated the more graphic the better)