Kisses him back

After a moment of hesitation, Harry choose to kiss her uncle moaning as she did so.

“Mmm,” Vernon said “You really are a slut aren't you,” He said as he reached a finger to squeeze and twist her left nipple and was surprised when a small of milk sprayed out of it.

“You had a kid you skank” Vernon said “Please tell me it wasn't with my nephew we don't need another freak like him”

Harry shook her head furiously surprised at the fact that she was lactating not knowing that she had put a very specific ingredient in the Polyjuice Potion that was used to induce lactation in witches that were having trouble feeding their kids.

“No” She said “I've never been pregnant before”

“Then how do you explain this” Vernon said pulling on both of her nipples and smirking as streams of milk came out of both.

Harry couldn't answer as at that moment she let out a moan

At that moment both Harry and Vernon were shocked as the door opened and Petunia came in looking shocked but then contemplative as she noticed how similar Harry looked to her dead sister Lilly.

“Who is this Vernon” She asked.

“Some Prostitute girlfriend of the freaks,” Vernon said “I don't know where the freak found her but she looks very familiar,” He said.

Petunia nodded “She does look very similar to Lilly,” She said and then looked at Harry “What's your name bitch”.

Hurrying to think of a fake name Harry came up with “Rose, Rose Weasley”.

“Well Rose” Petunia said “You look very similar to my sister”

“She's better than your sister,” Vernon said “She has a plumper rump and her breasts are bigger and lactating”.

“Lactating you say,” Petunia said walking up to Rose and pulling on her nipple smiling in delight when milk came out.

She then sat down next to Rose and Vernon and pulled Rose onto her lap where she started rapidly spanking her.

She turned to Vernon “I have a lot of ideas for her” She said “And I think it's time that Dudley gets to lose his virginity”

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