After a long day's worth of research, Twilight stretched from the stiff position of her wooden seat. On the way up the tree house's wooden stairs, she gave a little tilt of her head when she heard something humming behind her's and Spike's bedroom door. 

*Click click click* "Spike, are you ok?" she'd ask against the door. No response... but she did make out faint moans and huffs along with the buzzing hum. "Spike?" she'd ask a bit louder. Still no response to the purple mare. 

With a little magic she opened the lock to the door and creaked it open, hating to break his privacy but she worried if he was in trouble. What she saw shocked and embarrassed her. In their room was a full set of cow milking equipment, complete with a stainless steel container, gas powered motor and various styles of teat cups strewn on the floor... and one that pumped up and down on Spike's 5 incher.

"Oh my Celestia!" gasped the purple mare, putting a hoof to her mouth. As soon as she spoke, Spike's eyes darted to the door and his face flushed his whole complextion to a deep purple. "GHA! T-TWILIGHT DON'T LOOK!!" yelped the little dragon as he covered himself up quickly in his little basket bed, scrambling to get everything out of sight even though it was too late. 

To Spike's surprise and further worry, Twilight came into the room fully and shut the door. "E-erm... Spike, it's ok, it's not like I haven't seen your uh... 'spike' before." she'd say while trying to not give him a heart attack from her intrusion.

The poor little dragon had no idea how to fix this scenario. The cup still sucked and pumped away, the motor still puffed exhaust and the sounds continued. He was too deep into this now. "Ugh... I-I guess..." he'd sigh, feeling defeated and exposed while he gave in to the embarrassment; standing upright while the stainless steel cup moved slightly from the pumping walls to simulate suckling.

Even though Twilight had never seen or heard of this thing before, she was very understanding and showed him compassion by gently touching his cheek with a hoof. "I'm... I'm sorry I came in, I was just worried about you Spike..." she'd coo tenderly. Her voice triggered a small smile to the young dragon. "Meh... I understand Twilight, but ya really gotta give a growing dragon some space sometimes!" While he spoke he tried to remove the cup, but it remained firmly attached.

Twilight now looked to see the steel on his member, the smell of gasoline noticable now in the air for her. "Doesn't that hurt?"

"N-nah, it's just a little tight but nothing too bad." he'd say as he gave up getting it off of him, looking down to watch it gently move back and forth with each tick of the pulsator that filled the air with noise along with the motor's hum.

The purple mare was actually a little interested... fascinated even by the pumping machinery on her assistant... enough to ask a bold question. "Mind if I observe for a while?" she'd ask cutely. Spike on the other hand gave a little twitch of his tail and cock. Of course he didn't mind... secretly, he hoped there would have been a day where one of the mane six observed him masturbating. "Well... I guess it's ok..." 

With that Twilight sat with all fours cutely under her body to watch her little assistant masturbate with a cow milker. Her ears caught each sound, tick and twitch from the machine along with Spike while he sat upright in his bed; comforted by soft pillows while his pink rod was engulfed in shiny steel that hilted to his groin. He was treated like a prince by that device.

It wouldn't be long before his claws dug into the wicker basket and he squirmed about. Twilight simply teleported in a clipboard with a quill, keeping them afloat with her magic. "Wh-what are you d-doin' Twi?" he'd ask in grunts and huffs. No reply, just a simple smile and a little "Oh" sound; the mare entranced by the approaching orgasm from such a different way of pleasuring oneself. 

"D-don't look Twi, o-ok?!" he'd groan again in hopes of convincing her to respect this little bit of privacy, getting a reply of nothing once more. "T-twi!? D-don't do it, please! ...T-T-Twiiiiii? ...Uuuuuhhhnnn~"

Twilight kept her eyes focused on the once wide and clear hose that connected from his teat cup to the container; the opaque fluid flowing down in spurts as ropes clung to the walls while the core of his load sped into the tank. A sudden loud moo was heard from it as well which terrified them both for a breif moment; though it was simply an alarm near the pulsator that signaled when milk was entering the container. 

"Fascinating..." mumbled the mare, taking scribbles and notes to her board while angling the tubing slightly so she could get a better look of the viscocity of his seed. She gave it multiple, small kisses as the last clump raced out of sight; a distorted splatter being heard inside the container from the amount of cum pumped.

"A-ahhhaaa.... ahhhhaa... ahhhaa..." panted the little dragon, exhausted and sore from the harsh orgasm. He could hear his heart pounding in his head and was victim to uncontrollable spasms every now and then. Casually, Twilight gently and mercifully removed the teat cup from his cock with a loud, wet pop and splatter from some of his seed still coating the walls. The hum died down with a flick of a switch. 

Tenderly and with a motherly way about her she kissed her assistant on the lips, her front hooves resting on his shoulders while her back remained outside of the basket. Spike was both confused and in a bliss that he would not soon forget; one that lasted with their lips pressed well into the morning.