I am travelling through South America during a hot summer, on the local inter-city transport. It is sticky and humid and I can't wait to get to Rio. The bus empties and I am the only one left sitting near the back of the bus. There is this other girl sitting a few rows in-front of me. She has this long brown hair and olive skin like the Latin Americans. She is wearing an orange cotton t shirt and a pink skirt. We get to Rio and when offloading the suitcases it appears that hers was taken by somebody else. She is a tourist and has nothing other than her luggage, which was now stolen. She was very upset and she asked me to help her. I didn't know what to do, but offered her to come stay over with me in my hotel. There was nobody else there, the bus drove off, and she came with me to my hotel. She couldn't communicate with me as she spoke Portuguese only, but we managed with a few English words she knew..
We get up to the room and I change out of my sticky cargo pants and I put on a clean blue t shirt and some satin white panties. It was so hot that I didn’t put a skirt on. I put the ceiling fan on high. This girl, whose name was Tia, also wanted to change, but had nothing to wear. She showered and then came back into the room, and asked me looking at my clothes if she could borrow something. I told her to find something that fitted her and it would be ok. She drops the towel, revealing quite small breasts probably size A, but with large areolas. She puts on one of my white t- shirts and then puts on a pair of my pink bikini cotton panties. I thought it unusual for someone to wear my underwear, but in the circumstances, well , there was not much choice. It was so hot. She sits up on the bed and doesn’t put anything else on. We turn the TV on and watch some Spanish program we both don't understand.
I turn to my side and fall asleep from the tiring journey. Some time later, I wake up hearing little groans and I think maybe Tia is sleeping and having a nightmare. I turn from my side and I see her sitting up against the back of the bed, her knees up and her one hand touching herself on top of her underwear, actually my underwear. She doesn’t see me notice as her eyes were closed. I am shocked but I keep staring. Her nipples were hard , pushing out against the white t shirt, her areolas showing through as her right hand is slowly rubbing her nipple under the shirt, her left hand is dangling in-front of her open knees, while her index finger is slowly twitching up and down in controlled movements against her pussy. I had never seen a women masturbate in-front of me before.
I looked on knowing I shouldn’t be looking. Seeing her doing this excited me, I don’t know why, I had never had any lesbian tendencies before. I felt myself start getting wet, and my mouth dry up with a salty feeling as the onrush or hormones took over. She was moaning softly as she continued to touch herself. I then saw her fingers pull aside the panties and start turning in round little motions over her clitoris. I couldn’t see much more, but I suddenly find myself involuntarily guiding my right hand down to my panties, and start stroking up and down my vulva on the outside of my panties.