I’m a 22 year old trainee paramedic and after 18 months of different shifts and crew mates I recently got onto a regular shift and partner/mentor. Emma is 39, married with 2 kids and has been a paramedic for 15 years. We instantly got on, she’s got beautiful smiley green eyes and we laugh a lot together. People call her my work mom with Emma usually bringing me food in for our meal breaks and generally taking me under her wing. After shifts though, I’ve had many wanks imagining her being in bed with me. The uniform isn’t flattering but her gym fit body looks fantastic in it. One day I was chatting to a friend in the smoking shelter and he asked how I was getting on with Emma. I was singing her praises when he asked if she’d given me a blow job yet. I told him of course not, she’s happily married etc etc. He insisted she’d given him one and then said she’d invited him home so that her husband could watch as he fucked her. He said he’d declined the offer, not wanting another man involved in the sex. I laughed him off saying it was nonsense but he swore it was true and that Emma’s hubby was under endowed and hadn’t I noticed her naughty eyes? I just walked off laughing but my wank had an extra kick after shift that day. The weeks went by and the thought of what he’d said stayed with me. Although Emma and I talked endlessly during shift there had never been any flirting or innuendo so I felt sure my friend had been joking and settled down to learning my trade and occasionally tossing off in bed thinking of what I’d like to do with her. Then one day we went out to an old man who was stuck naked in his bath. Bless him he was so embarrassed when a woman walked in to help him but the jobs the job. We got him out. He was unhurt so we made him comfortable and left him at home. Back in the ambulance I jokingly sympathised about his wife as the man was quite small. Emma told me off for being unprofessional and I did feel bad until she started laughing, the little tease. Then she said “anyway he’s bigger than my husband !“. I laughed saying I’m sure that’s not true but Emma said “no really. I love him but he is lacking in that department. He does his best in other ways of course. But all my ex’s were quite big and you can’t beat cumming on a biggy “. She was so matter of fact as if we were chatting about the weather or something but my god I was struggling with a hard on restricted by my trousers. I shifted uncomfortably in the drivers seat. Emma looked at my crotch. “Is there a problem?” She asked. I said no but she laughed “yes there is. Why have you got boner?” I insisted I hadn’t and it was just the way my trousers lay but she poked it and laughed. God I got the naughty eyes. “Why is it hard?” “You talking about cumming. Just sort of turned me on a bit”. She laughed even more “Young men! It doesn’t take a lot does it? I tell you what though, you seem blessed! I wouldn’t mind seeing that in the flesh” I could feel myself blushing but still managed to blurt “ I’ll show if you do”. “Cheeky!” She giggled “what do you want me to show you?” Nervously I whispered “your breasts”. Emma laughed long and loud but said “ Deal. Let’s book up. They should send us back for break now “. So we called the job in and got returned to station for break. Unusually for us we didn’t speak. I felt the air was heavy with expectation although I still wasn’t sure if Emma had just been teasing me. The station gates opened and she finally spoke “park at the far end Ryan” Gulping I complied. I was actually shaking not sure if this was really going to happen. When I’d parked Emma looked me in the eyes and said without smiling “Are we doing this?” “I want to” I replied croakily. She smiled kindly, jumped out of the passenger side and into the back of the ambulance via the side door. I quickly joined her. Straight faced and without taking her eyes off mine she unbuttoned the green shirt until it was fully open. He bra was a sexy lace black with the lovely curve of freckled boobs above. Not massive, 32 c I know now, but beautiful. She reached back and unclipped the bra revealing them in their fullness. Small dark erect nipple. I gasped and reached out. “No no no” she smiled, naughty eyes “your turn”. She sat down on the rear chair as I fumbled with my belt. She laughed she’d got the best seat in the house. I slid my trousers down my thighs. Emma licked her lips as I lowered my boxers. My 8.5 inches sprang out just before her face. This time she gasped “wow” not taking her eyes off it. Naughty turned to lustful eyes. She gently ran her fingers along the length. “It’s beautiful. Do you mind if I suck it?” I asked if anybody had said no to that request. She laughed as she now gripped the base firmly. “ no actually “ she said before taking me into her hot milf mouth. I groaned loudly and she took it out laughing again “ keep quite you nob. Someone might go past” I apologised profusely and she whispered “you can cum in my mouth, it’s tidier “ I asked, crudely I’m afraid “ Emma can I fuck you”. She shook her head “No. I really am noisy. They’d hear me in the mess room”. With that she plunged me back into her mouth and literally fucked me with it. All her experience was too much for me and I knew I couldn’t last. I cried loudly “IM CUMMING” before slapping my hand over my mouth. I must have looked ridiculous and I dropped out of her mouth as she began laughing. The first blob of spunk hit her hair and dribbled onto her forehead. The second hit the shoulder of her shirt and the third her lovely tits. “You messy twat. Get me some tissues “ she laughed. I shuffled off trousers around my ankles. Emma stood up and I tried to wipe myself off her becoming a bit fixated on her still bare tits. Naughty eyes smiled at me and I dared to kiss her. She responded passionately and I started rehardening , rubbing myself against her. She broke off “look you’ve got jizz up my trousers now for fucks sake”. Again I mumbled my apologies but again she laughed. “Look. Go to the toilet and clean up. I’ll do what I can with all your man mess on me”. Still apologising I left the ambulance and did as I was told. So my mate wasn’t lying. As I washed I hoped I’d get the further invitation into her marital bed because I’d certainly say yes. When I returned to the ambulance Emma was sat in the front. “You ok?” She asked. I nodded and told her “Er, there’s still spunk in your hair Em. I wouldn’t want your husband to see” She tutted “it’s bloody everywhere you healthy young fucker. Oh and that’s ok. I’ve just spoken to him and told him what happened.” “Oh god “ I said “what did he say?” She smiled naughtily “He said to ask you around on our next days off if you’re free” Immediately I replied “Oh yes I’m free” So next Wednesday is my next learning day with my hot mentor.