Ness watched Phobos' reaction to the shoe with interest and most importantly surprise, that was what made her get up from where she was in one quick movement. The dude proceeded to kick her shoe into the water, Ness wrinkled her nose at the loss of the shoe. That... was not approved.
However what followed after made Ness stare, she almost felt like her mind was playing tricks on her, but no- the guy really had swore and jumped in after the shoe as if he were chasing gold. The shock lasted for a few moments, then she grinned.
Without intending to, he had just made her evening easier and far more entertaining. She contemplated a few things, courses of action she could take since his move was unusual. Unanticipated.
A shrug and then Ness jumped in after Phobos into the delightfully dark water. As soon as she sank in her body recognized that it was right and it was like home.
Sleep scales and dark eyes, fins and undulating neck it was easy to follow Phobos into the water and brush her tail against his leg in greeting.