The pair walked back over to the two guys.
"Sorry guys. As I was saying, my name's Evie, and this is my sister Emily" she said apologetically.
"I'm Mike" said the one on the left.
"And I'm Lucas" said the right one. Emily was kind of glad Evie called dibs on Mike, she thought Lucas was cuter anyway.
The girls shook hands with them, then Evie moved in towards Mike, her face looking up into his, inches away.
"I'm gonna be honest Mike, my sister and I just reaaaaaally want to get laid right now. Do you and Lucas want to be the lucky guys that get to do us?" she said confidently.
Emily was a little taken aback at her sisters bluntness, but couldn't deny that it was probably going to get results.
Mike looked at Lucas, who turned to look at Emily. She smiled and moved towards him, pushing her boobs into his chest, kissing him quickly and delicately.
The guys looked at each other again.
"Yea alright. We're parked round the corner, is your place free because our parents are at home"
"Yea our place is fine" Evie replied. Mike took her hand, Lucas doing the same for Emily, and lead them back to their car.
The girls hopped in the back seats. Emily gave some quick directions, then leaned over towards Evie.
"Mum's not home right?" She asked.
"Nah, she's already at work"
"Well what about Aaron?"
"He's probably just sat in his room" Evie said nonchalantly.
"Well should we really be bringing two randoms home when our brother in his room in between ours?"
"Nah it'll be fine. I'm not taking Mike to my room anyway, I'm pouncing on him as soon as the door closes. You can join us in the lounge or head to your room, I don't care"
Emily leaned back to her seat and looked out the window. They were only a couple of minutes away. She looked back at Evie, who apparently had decided she wanted to get the party started now.
Her head was tilted back, eyes closed with one hand slid down her shorts, very obviously fingering herself.
As they parked the car up outside, she snapped out of it, opened the door and hopped out.
'What on earth happened to her over the last night?!' Emily thought to herself.
As soon as Evie walked through the front door, she stripped off her clothes, turned to Mike and pulled him in for a passionate kiss. Within a minute his pants were off too and she'd shoved him onto the sofa, making out with him.
Emily realised she hadn't taken her eyes off her sister when a pair of hands appeared from behind her, massaging her breasts.
'Oh shit yea I have a guy here too' she remembered.
She could tell Lucas had already stripped down too, because she could feel his dick pressing against her arse and thighs. She reached around behind herself and stroked it while enjoying the attention her tits were getting, milk leaking from her nipples.
Emily watched Evie, as she lifted herself up and grabbed Mike's dick, slowly lowering herself onto it. She couldn't believe she was watching her sister get fucked by a stranger, and that rather than be weirded out by it, she just wanted to join in.
Emily lead Lucas by the cock over to the sofa, and pushed him down next to Mike. She didn't bother taking off her dress, she wasn't wearing underwear anyway, then swiftly climbed onto him and impaled herself on his cock and shoving one of her nipples into his mouth, forcing him to drink her produce.
Evie noticed Emily's milky tits, and licked her lips, staring at them longingly. She quickly got up.
"Emily, get up." She demanded.
Emily struggled to remove herself from Lucas's dick, but she complied.
Evie laid down on the sofa, head near one end, and spread her legs.
"You. Start fucking me again" she insisted, pointing at Mike. He didn't hesitate to do what he was told, pounding away at her again in seconds.
"Bend over the end of the sofa here and feed me" she instructed, looking at Emily.
Emily did as she was told again, bending over the end of the sofa near Evie's head. Lucas went straight back to work, grabbing onto her hips and fucking her from behind.
Drops of milk kept leaking from Emily's tits, splashing Evie in the face and mouth. When Emily realised what Evie meant by 'feed me' she leant forward more, shoving one of her nipples into Evie's mouth. She latched on instantly, drinking from it so hard it was actually hurting Emily a little bit.
Combined with the pleasure though, Emily was already mooing uncontrollably as she rocketed towards orgasm.
The familiar hot feeling moved through her body again, this time focussing on her hands. Emily realised she couldn't separate her index and middle finger, or her ring and pinky fingers. She watched helplessly as they all shortened slightly, and the black thickness from her nails started to spread over them, giving her hoof like fingers. She found she could still bend them, but the felt strong and firm. The fur from the back of her hand started to spread, meeting her hooves where they ended, and covering the palm too. Finally, her 'finger' tips started to widen and flatten out which she assumed she could use to walk on all fours if she chose to.
She looked back at Evie, who had changed breasts at some point during Emily's transformation, still drinking as if she hadn't had any fluids for weeks. Evie figured she must have been having her own orgasm, muffled moans escaping through mouthfuls of milk, her eyes rolled into the back of her head as she quivered.
Emily noticed that the whites of her eyes were no longer... well, white. They had changed to a golden, yellowy colour.
Long whiskers had also sprouted from her cheek, right next to her nose. How she had managed to keep drinking through all that, Emily had no idea.
Finally it seemed like Mike was finishing off, as he stopped thrusting and started to shake, as he blew his load inside Evie. She finally detached from Emily's breasts, gasping for air and moaning simultaneously.
When she'd caught her breath, she learnt upright up kissed Emily aggressively. Lucas obviously couldn't hold back anymore at that sight, and he started emptying his load into Emily, pushing her over the edge one more time as she mooed into her sisters mouth, tongues wrestling each other. The guys pulled out as the girls continued, and started to put their clothes back on.
They obviously had no interest in hanging around, trying to get the girls attention to tell them they were going to leave, but being ignored as they kept on making out with each other. They shrugged at each other and left.
Emily moved around the sofa and climbed onto Evie, continuing their make out sessions. It went on for another five minutes until they cooled off, and just laid there together enjoying the company.
Evie finally broke the silence.
"Smoke?"
"Oh god yes please"