His mother and aunt Lily

Ben gulped, he knew this would not end well. The two people he saw was his mother and aunt Lily, he wonder why they are here. Neither Gwen or him told them about the party's location, they just a party with their schoolmates. They where going with their fathers to their own Halloween party, then why are they here, Ben thought.

Then Ben saw their costumes and he nearly passed out, first his mother was dress in a pink latex nurse costume, it was a one piece dress. That was very short and had one zipper in front, that was a third of the way down. Ben could see the outlines of her red lace bra, she also wore a pink nurse's hat, a pair of pink gloves, a pair of pink thigh high stockings and finally a pair of pink heels.

His aunt Lily was wearing a sexy French maid outfit, it was very short and show off a lot of cleavage. She also wore a white apron, a pair of white gloves, a headdress, a pair of fishnet stockings and a pair of black heels.

Ben was shocked, maybe his mother would dress in a costumes like that, but his aunt Lily. She always been very conservative, that was a big reason why she didn't like Gwen fighting monster and aliens with him.

He had to get then to leave or at the very least, find out why they are hear.

They spotted him, Ben gulped as his mother and aunt Lily walked over to him.

" Hello, so this is the party you and Gwen went too." Said Sandra smiling, Ben looked at aunt Lily. She was blushing and trying to cover up her costumes with her arms.

" Where's Gwen?" Asked Lily, Ben gulped.

" She with Julie, they went to the bathroom." Said Ben, hoping this would satisfied his aunt.

" Julie, isn't that the girl you have a crush on." Said Sandra smirking, this made Ben blushed. He just nodded, noting wanting to give anything away.

" Then we just wait here with you until they returned." Said Aunt Lily, this made Ben nervous. He just had to stall until he could think up something to get his mother and aunt Lily to leave.

"By the way, shouldn't you be with dad and uncle Frank ?" Asked Ben, he wanted to fine out why they where here and is uncle Frank and his dad was here too.

Both women sighed, " There was a emergency at work, So the party was cancelled. So we decided to head back to my place, then when we arrived. We saw two boxers, inside where this costumes and a map to this location." Said Sandra, Lily just nodded.

So someone wanted then to come here, but why Ben wonder. He hoped nothing would happen to this party, he had to fine out who and why.

"We decided to try on the costumes, Lily was a against it but I talk her into it." Said Sandra giggling, Lily was blushing.

" Then once we saw ourselves in the costumes, we got a strong desire to com here." Said Lily, nervously.

In a dark corner, Charmcaster looked at the three Tennysons. She grinned as her plan was coming together, she used her magic to cancelled the party Sandra and Lily where at. She also put and enchanted their costumes, so they would try them on and want to come here.

She wanted some MILF in Ben's harem, and both Ben's and Gwen's mothers fit that title perfectly. They where in their forties, but looked half that. Their bodies where very well tone and both had nice asses. Their legs long and their breasts where still firm and both had E-cups.

Yes, both would be perfect for Ben's harem, now it was time for phase two of getting Ben to have sex with them. Charmcaster chanted a spell, now things will get interesting she thought.

As Ben, Sandra and Lily waited, several boys grabbed big containers of green slime. Then they started pouring it over random girls, including Sandra and Lily.

Both women yelled, as they where covered in cold green slime. Ben looked around and saw several more girls covered in the slime. He thought is was just a prank, but knew Lily was going to get mad.

Sandra started laughing, why Lily frowned, " Come on Lily, we are at a highschool Halloween party. They are just having some fun." Said Sandra smiling, Lily didn't think this was funny.

" Listen their a few bedrooms with showers in them. Let's fine one and get you two clear." Said Ben thanking this was the perfect distraction.

Charmcaster smiled, the green slime had a very power aphrodisiac in it.

Ben lead both Sandra and Lily through the mansion, looking for another bedroom with a bathroom. Sandra and Lily began to stared at Ben, soon images their last trip to the beach filled thier minds.

Ben in only his swim trunks, showing out his perfect body. The mothers drooled a little, then they shook their heads. No, this is my son, screamed Sandra. Lily had a little bit harder time getting the images out of her head.

Ben was also having trouble keeping naughty thoughts out of his head, but these where fantasies. Fantasies about his mother, Ben knew she was a MILF. He heard his friends say it all the time, so some time he imagine her in bikinis, lingerie or just wearing an apron cooking him food.

Sure those fantasies went further, but now he couldn't stop thinking about them. Then there is his aunt Lily, he had fantasies about a mother daughter threesome with her and Gwen.

He tried not to think about them, but in the end he couldn't. Soon he found an empty bedroom with a bathroom.

The mother quickly went into the bathroom, the left the door open just a crack. Then they began to strip, soon Ben heard a shower turn on. Ben did his best not to think about his naked mother and aunt taking a shower. Not thinking about water hitting their breasts or them washing each other.

Ben was sweating, he was getting hard, he had to do something. He was about to leave when he heard moaning from the bathroom. Ben tried to ignored it, but soon he sneaking his way over, he gulped as he peeked in and saw....