In the short time you looked away Lyra's feet have already fully transformed, her legs now ending in a pair of bovine hooves. "Shit! Not my hands!" she whines, turning away from the gate which you realise she now has no hope of opening as you see that her arms now also end in a pair of hooves.
Suddenly your vision flashes white and you bellow in pain, only dully aware of Lyra joining in as you both cry out as you feel your backs crunch and stretch, your spines realigning in a series of sickening pops and cracks.
As your vision comes back into focus you see Lyra staggering up onto her hooves, her noticeably wider back straining as she stumbles about trying to stand upright. "No! I... I can't stand up!... Why can I stand upaaahhhhhh!" yelping in pain mid sentence Lyra's stops, moaning in pain as her arms and legs visibly tremble, muscles twitching beneath the surface of her skin.
Forcefully setting your own pain to the side you manage to slowly walk on your new hooves towards Lyra, trying to ignore your aching balls as you move closer to comfort her. "Lyra we'll get through this, we're in this... togeth...ahh" you wince as your tail finally extends with a snap, "...together until we find a way to undo this".
Lyra manages to look back over her shoulder at you, she opens her mouth to respond but whatever she is going to say is cut off as she gasps, all her breath sharply exaled as her arms and legs are suddenly and violently snapped back, realigning into the ungulate limbs of a cow as she falls forward, faceplanting with her enlarged butt practically in your face.
As your own limbs realign you yelp but manage to stay upright on your hooves, but that's the least of your problems. The smell coming from Lyra's crotch is intoxicating, your cock is beyond erect now, your huge shaft feels like an iron rod as you struggle to contain yourself, but the way things are going you don't know for how much longer you are going to be able to hold back.