"The closest shoulders shall become one..."

"Huh... 'The closest shoulders shall become one, and so the chests shall converge, producing a tri-breasted chest. The inward arms shall become flesh inside the new form.' What does any of this even mean?" Lindsey asked, confused. "Tri-breasted chest? Is that like... three boobs?"
"I... think so?" Jane responded, equally perplexed. "I'm not really sure what any of this means... uh, t-try it anyways?"
"If you say so..." Lindsey looked at the passage, then started trying to read it. "Kandhon... K-Kandhon ke maddy-... madhy bha-...bhaag ke s-stan jud jaate hain... what the hell is this? K-kandhon ke madhy bhaag ke stan... j-jud jaate hain..."

As Lindsey kept repeating the passage, Jane began to feel a weird feeling in her right arm, like an odd, uncomfortable warmth. She tried to shake it off, but that only got it to against Lindsey's right arm.

The odd thing was, though, that it stuck. Her arm plastered itself against Lindsey's, distracting her from the spell.
"Jane, what are you doing? I'm trying to read this!" She complained, feeling the strange way her left arm was now glued to her friend.
"I... I think it's working, Linds..." Jane mentioned, uneasy, as she witnessed their arms slowly melting together.
"Oh my... I think you're right!" She grinned. "I didn't actually think it'd do anything!

Their arms continued to melt, until they were a single arm. They continued to melt, though, remolding into a simple fleshy extension. At that point, they were feeling a growing tug towards each other. Without any other choice, they went with it, allowing their bodies to touch their odd center arm-thing. As soon as they made contact with it, their sides fused with it. The sight wasn't unlike the way droplets of water congeal together. Any semblance of an arm was instantly erased as their bodies smashed it between them. It rose slightly, separating them halfway down their odd new fused torso(s?).

It didn't stop there, though. It was evident the tri-breasted chest part would come into effect soon when they still grew closer. Their inner breasts got closer and closer until they pressed into each other, sharing the same droplet-like semblance when they popped together. They had a single nipple on their new shared part. The sizes of their own breasts equalized as their chest combined, giving Jane a slightly better rack, while slightly diminishing Lindsey's.

"Oh. So... so that's what it meant..." Jane said, looking at it. As soon as she changed her gaze to her friend, though, she nearly jumped; they were very close together. They could kiss if they tried hard enough.

"Oooo... I like this. I've never had three tits before." Lindsey mentioned, in awe..
"But you still don't..." Jane said, confused. "This is my tit." She squeezed the leftmost tit on their rack.
"Oh, come on, Jane. We share the same body now, so it's my tit, too."
"I guess..." She took another glance at their body. "Anything you wanna do, then? Anything you wanna try?"
"Good question..."