The sky was very dark when Erika arrived at Melissa's house, and she could hear the faint rumbling of thunder in the distance like a rumor, but still no sign of rain. The air was very hot and heavy, making her clothes stick to her body.
She rang at the door; after a minute, Melissa opened with the widest smile on her face, looking at her with her dark blue eyes. She wore a sky blue summer dress with shoulder straps and an abundance of folds and frills overer her thighs that were moving as a slight breeze came into the house. She had let her dark brown hair in loose waves and curls, making a nice contrast with her pale skin. "She looks like an angel", Erika thought to herself, feeling dirty in comparison with her messy bangs and sweaty skin.
Instinctively, she gave Melissa a warm hug; Melissa hugged her back and squeezed, pressing their breasts together between them. Erika felt light-headed, intoxicated by her friend's smell. Finally she broke the hug. "Sorry, I'm all moist from the weather!" she said with a blush. Melissa giggled but said nothing, letting her in.
Erika was a bit absent-minded during diner, surrounded by Melissa's family. She had trouble keeping track of the conversations, mostly nodding and answering shortly. For some reason she still felt pretty hot, and the lightest touch or look from Melissa gave her shivers. After eating, the two of them sat in front of the TV with ice-creams while the thunder was growling louder outside the house.
Melissa kept moving closer and closer to her friend, and at one point she accidentally brushed her ice cone against Melissa, put some on her shoulder. With a giggle she leaned forward and licked it, making Erika turn red and provoking a familiar tingle between her legs. "Oh no" Erika thought. She squirmed a little but the feeling only increased; some kind of pleasurable, warm sensation, almost an itch that needed scratching for relief.
As soon as the girls had their hands free of ice-cream, Melissa leaned against Erika in front of the TV, holding her hand. It usually was a platonic, friendly gesture between the two of them, but Erika felt on fire. She craved proximity so much; she craved her friend's touch. She... she wanted her friend to fondle her.
Erika realized she felt wet between her legs and jumped off the couch, pretexting she needed to go to the loo. As soon as she got there, she closed the door and pulled down her shorts, inspecting her genitals.
To her surprise and relief, the dog penis had not been returning. Her lips and clitoris looked all red and sensitive though - maybe a side effect of drinking the goo? She touched herself there and it elicited a stronger tingle, making her clitoris swell very slightly.
"Ok, no touching!" Erika thought, unsure if this was a normal female reaction or the premise of another transformation. She pulled up her shorts and exited the bathroom to go back to watching TV.
Melissa was there, with a drop of strawberry smoothie at the corner of her lips. "Oops, sorry Erika! Saw the smoothie you brought and I just wanted to taste it, I hope you don't mind! There wasn't much left anyway..." After Erika gave her a forced smile, she went on: "by the way! I still have those old bras I told you about if you want to try them, they're in my room".
Erika nodded and said nothing, following Melissa, but her heart was racing. The goo mixture turned her own body back to female and seemed to make her very horny, so what would the effect be on Melissa?