That's a Stretch

Summer Hart and her lover Tony Sting wanted to attend a yoga class united. Upon their arrival at the studio, they were greeted by their charming instructor, Eva Maxim, and another participant named Izzy Wilde. As they settled onto their mats, ready to stretch and breathe deeply, Eva's attention was immediately captured by Summer's stunning chest and playful rear.
Eva couldn't resist approaching Summer and subtly engaging in intimate contact. Summer's curves reacted to Eva's touch, setting a seductive tone. Feeling the excitement building, Eva slipped her significant member between Summer's hip line.
With smooth thrusts, she elicited a playful reaction from Summer, revealing more of her assets. Meanwhile, Tony perceived the situation and abruptly exited the scene. In contrast, Summer didn't seem deterred, opting to stay and revel in the escalating erotic energy within the studio.
Especially since Izzy coyly expressed her desire to partake in the sensual experience. Would a threesome be the ultimate exploration or a step too far into the realm of frivolity?.