It's days away before I get my period. I know it because of the uncontrollable desire to fuck. I'm super horny the days leading up to my period. If my wife was human, she would have probably been exhausted for those couple of days. Luckily, her body and stamina are stronger so she could go for hours or days even.

We're standing so close on the train that will take us to our district after a long day's work. There is barely any breathing space between us. I have grown accustomed to overcrowded trains although Elma told me that one time I passed out and she caught me. She thought I was dying and created a huge scene on the train. Fortunately she was advised by civilians to let me rest and to give me water as soon as I regained consciousness. I couldn't believe it myself but the doctor told me my reaction was due to long periods of overwork and fatigue and the overcrowded train just fueled it to occur.

Today is different though. I don't feel that fatigued. Actually it's rare but I feel a burst of energy surging through me after a day's work at the company. I can feel her warm breath on my shoulder and neck. Her soft breathing is so erotic. It's driving me wild. The train stops and half of the passengers exit the train. I feel like I can breathe again. There is more space between the two of us now.

In a few moments the train makes its second stop and many passengers get off again. The few passengers now remaining are scattered about. It's only one more stop and we're in our district. I look around and notice a couple who are busy with their baby in the far left corner of the train. Next to them is a senior sleeping man. Four seats away from where we are standing are three teenagers. The girl looks engrossed in the novella she is reading. The boy is deeply focusing on something on his phone screen and is wearing headphones. The other boy is sitting by himself and wearing headphones while gazing through the window. Neither of the passengers pay heed to us.

Elma is silently gazing through the window. She's a generally quiet person especially when she's in public. I guess most people are. My body was overheating. In the past, I explained to Elma that human females feel very aroused during certain times of the month especially the time before their period comes which explains my current 'dilemma'. I couldn't wait until we were home for some reason. The thought of doing it in such a public place is pushing me over the edge.

I inch my face to her neck and plant a kiss on her sweet flesh. She shudders. I capture her attention. "Na- Nai, what're you doing?"

In a speedy motion, I grab her ass. She is surprised. "Woah Nai, are you alright?" she asks with a confused expression. We are still standing up even though there are many empty seats now. I plant another kiss on her neck.

"Nai, um-um when we reach home, we could continue this, ok?"

I grab her green tie and lightly shove her in the train wall. "Hey I'm giving the orders here."

Her face turns bright red. "But this is a public place. What if someone sees us?"

I glance around to the passengers minding their own business. They are not too close to us to hear either. "No one will see us. They're not paying attention to us anyway. I want you now."

I kiss her. I pull her closer to my body. Her body is warmer. I let my right thigh massage her crotch through her skirt. She moves against my thigh. I feel her juices on my thigh as she dry humps it like she never has before. I then snake my hand inside her black pencil skirt. I could feel her moisture through her panties. I gently rub her clit and pick up my speed. She bucks in my hand. My fingers enter her warm canal. Her face is ten times redder. She stifles a moan. "Uh" her soft moan drives me even wilder. I continue fucking her hot wet pussy.

After a few more minutes, I can feel her dick protruding. At times of heightened arousal, sometimes her dick would appear.

I quiver as I feel her hand brush against my thigh. I feel the tip against my lace underwear. It now veers in my crotch. The head was now brushing off my cunt through my soaked panties. My body naturally begins to rub against the hard tip. I'm roughly absorbing Elma's hardness by rubbing it stiffly through the thin fabric. My cunt is thirstier. I can no longer take the teasing. Elma moves a little, inwards and outwards. She's dry-humping me inside the skirt and I am in total ecstasy. I bite my lips to prevent exhaling a moan. She touches me to ensure I am ready. Heck yeah, I am!

Her hand guides the monster-size cock as it pushes my panties to the side to allow entrance. My breath hitches as she thrusts into me. She penetrates deeper. My body moves fastly against it. I am now taking her full cock in my pussy. She softly moans again but only I hear it. I could feel her twitching in me. In a matter of moments, she shoots her load in my womb. It's winter here but I'm not feeling that cold because her hot sticky cum feels great in my womb and warms me up. She injects another load of her hot semen in me. And then another.

Suddenly the train comes to a stop. We quickly fix our clothing. I glance down my legs to ensure I'm not leaking cum. No cum is to be seen miraculously as I am sure Elma shot about a litre in my womb.

We exit the train. "That felt great El. Guess I'll treat you tonight."

We stopped at a fast food restaurant. A few big macs and milkshakes later, and we are sexing again in the restrooms. I am like a wild animal. I When we get home, I orgasm twice and we go to sleep.