Jane felt a familiar dry sensation on her legs. Her husband was away on business, her 17 year old daughter was out on a date and her three youngest children were asleep.
Jane hurried to her lair, a hidden chamber below the house where she could transform into her true self. Jane striped naked as the Transformation started. Her legs painfully merged together and began stretching out into a snake tail. Her skin below her waste became dry and itchy. Slithering on the ground, Jane feverishly began trying to she'd it. Eventually, the skin came off and her scales glistened as sweet relief from itching calmed her. Jane's upper body changed too. Her upper body became more muscular, while still retaining her feminine beauty, which was only enhanced by her shedding her human skin entirely. While her upper body remained mostly human, aside from the seductive Serpentine like eyes, and her forked tongue. Her snake fangs grew from her teeth.
Jane stretched as she conjured herself more appropriate attire in the form of a snake themed corset, golden armlets, and matching earrings.
"Ahh, much better." She said in a naturally Sultry voice. "It feels so good to be out of that troublesome human skin." Jason said as she ate the skin. The only reason she tolerated it was because of her children. She didn't feel anything towards her husband aside from seeing him as just the latest in a long line of mates. Jane wasn't even her real name, it was the latest alias. Her true name, cliche as it was, was Nagina.
While she couldn't care less about her husband, her children were everything to her. Nagina had children before, but they were either dead, been born as humans, or were far away. She was certain one of her children would Transform any time now. Even if this brood were nothing but humans, Nagina would still love them with all her heart. But she prayed that they would be naga's like her.
In her haste to change out of her hated human form, Nagina neglected to close the door to her lair.