I parked at Margo's place before 7, began to off load the mower and she came around from the back with her wheelie bin. I asked how was her trip to the USA but she wasn't due to leave for another week. I hadn't taken much notice of Margo but today she had on tight jeans n heels and looked hot, and before I could think I said how sexy she looked; it just blurted out. We glanced at each other, something sizzled and she said I had better come inside. I followed her in with my eyes locked on her ample bum; she would be a size 16 and in her early 40's, I closed the front door and we started kissing like 2 randy teenagers groping each other with our breaths already hot n panting. Cock was rock hard; he was up while we crossed the lawn, Margo was pushing her hand down my shorts feeling for his length while I had got her top off plus her bra and was lavishly sucking her very ample breasts and rubbing both her nipples, just licking and sucking and massaging, her chest was heaving with lustful panting, she then went to her knees, pulled down my shorts and sucked cock into her hot mouth and working her lips and tongue up down and around his full length. Her hands were also massaging my balls, she wasn't gentle but it felt fantastic and I began to rock my hips in time to her pumping mouth, I got down to her level before I blew my load, pulled off all her pants and dived between her open legs to suck, lick, probe n tease her clit. For a largish woman her vagina was small, I used my finger to delve inside, my tongue played with her little pearl, she was rocking her hips then twisted around to take cock back in her mouth and we played a hot n sweaty 69 for a while. But I couldn't ignor that cock was close again to bursting and I wanted to plunge him deep inside her cunt, her moisture was freely flowing and I had slipped a wet finger in her arse, between that and my tongue her hips were heaving up, her legs locked hard on my head and she moaned with wanton orgasm. I couldn't wait any longer I was hot to explode, cock slid deep in her cunt, her legs were up in the air as I fucked her furiously our hot panting breaths filling each others ears as I fucked and fucked and fucked and blew my load in gorgous release. In a moment she got him out and sucked him back into her mouth; we had been at like animals not knowing much about the other but this one little action was beautifully intimate. Cock was sagging as she suckled him and drained the cum and licked him clean. I guess we just needed a good fast fuck on the day as I had been mowing her lawn in Labrador for a year or so and we and only exchanged the usual pleasantries and never thought of sex. I've gotten to know a few women intimately on my rounds and some are what you would call regulars and we have a good time either on the job or meeting for lunch and wine and good company. Today with Margo may be a one off, we'll see when she's back from the USA.