This is showing the rubbery mare puffing herself up much bigger, bustier and curvier, plus bigger in tail and even horn, via an air pump. She just finished a good session of pumping, and has set her pump down whilst feeling her much more hugely inflated form, enjoying how BIG she feels, and how good it truly feels to be so puffed up whilst standing there. Of course, with her pump left right there, anyone now can be free to possibly pick it up, and perhaps use it to pump this mare up even more. Perhaps it’s you who ends up doing so, or another? Either way, Lyra’s too much in heaven right now to care as she enjoys her current size and figure.