Emily slowly lifted her skirt to look under the wet spot. Erika watched as her friend revealed soaking panties stretched over 3 inches of erection. A few beads of pre seeped through and dripped on the floor with a wet noise. Emily started sobbing.
"Oh... there there Emily, it's going to be okay! Don't worry..." Erika began, and Emily jumped at her neck, clinging tightly as her eyes filled with tears.
Erika hugged her friend back, and the musky scent of Emily's goo reached her nostrils, flicking a switch in her brain. As the two friends leaned in each other's embrace, Emily started pressing herself against Erika's groin, and Erika let out a moan. Soon the erection was lifting Erika's skirt as it rubbed between her thighs, and Emily started grinding against her friend's panties.
Erika was loosing her mind. She had drank her own goo this morning to turn her body fully female again, but as a result she was in heat. Right now, she wanted, she needed to feel Emily's dick.
As Emily's whining was turning into lustful heaving, Erika looked around, looking for a quiet corner. The bathrooms were at the end of the corridor though and Emily was in no condition for the walk. Erika opted to go hide under the nearby staircase.
"Emily, remove your panties before your ruin them. I will make the hard thing go away", she said, as she removed her own.
She then sat Emily in the dark corner under the staircase, and kneeled in front of her friend, lifting both of their skirts. Moving closer on her knees with a leg on each side of Emily, Erika's sex met the leaking erection and the two girls started frotting.
Erika let go of the skirts and unbuttonned their shirts to play with their breasts. As her nipples rubbed against Emily's, their hardened in the colder air. She also noticed that three rows of teats had appeared on Emily's belly and tugged on them a little.
Emily let out a lewd whimper. Her dick was turning a deep red and more canine in appearance, throbbing against Erika's moistening pussy. Erika's hips bucked in response and she pressed herself on Emily's length without even realizing it. In an instant, she engulfed Emily's whole cock in her pussy.
Delicious waves of pleasure buzzed from their connected parts under the folded skirts. The two girls moaned softly, unable to stay perfectly quiet as Erika rammed herself on Emily harder and harder. Emily hugged Erika tightly again as she felt something swell at the base of her penis - a canine knot, locking them in pure bliss.
"E... Er-ika", Emily moaned, "it's... it's going to happen soon..." she whispered. Between her legs, the two swollen orbs were churning intensely and drew closer to her body.
Still sitting on top of her friend with their skirts covering the action, Erika too felt her insides clench as she was about to climax. One last time she rammed herself around Emily's knot, and the first geyser of cum exploded deep inside her. She quickly had to put her hand over Emily's mouth to muffle the lewd moans her friend was making, clenching her own teeth to keep from howling of pleasure.
The chaotic bucking faded to a mechanical spasming as Emily emptied herself in Erika, the thick canine cum overflowing Erika's lower belly and pooling under the two girls. Erika removed her hand from Emily's mouth and kissed her hungrily, her pussy still knotted as she was sitting on top of Emily with the skirts loosely covering their lower bodies and the puddle beneath.
Suddenly the two friends heard footsteps from above as someone walked down the stairs over their heads.