Trap or no, you feel pity for the poor animal. Just standing by and watching anything in pain is hard, but the sounds coming out of the cow are almost gratingly saddening. You can't just leave it to suffer.
Unfortunately, the only way you can think of to help a cow with an excess of milk is to... well, milk it, and you've never done that with a regular cow, much less a latex one. Do you yank it hard, or just gently tug it? How far do you have to pull it, and do you have to do all of them, or just two? What if there's some super-special technique to it, and if you don't do it the cow dies?! No, you don't have time to think about this. She's sounding like she feels more pain every second, there's no time for you to think. Deciding that the best course of action would be to just take the plunge, you reach down to the smooth, rubbery udder, take two teats in hand, close your eyes, and just give them each a bit of a tug. You hear a splash. Opening your eyes again, you feel instant relief as you see that the puddle of milk beneath the cow has grown ever so slightly, some excess liquid dripping from the cow's udder. You pull again. Again, milk squirts from the teats, into the puddle. The bovine seems appreciative, as she's stopped making the pained noises, and now stands calmly as you milk it. In fact, you feel what's almost a sort of exhilaration, the mere fact that you appear to be doing this so skillfully without any prior experience surprising and delighting you. The rising enjoyment that you feel, coupled with your desire to help the thing, soon brings the milking to a sort of autonomy, and you mindlessly continue on without a thought until the milk finally ceases to flow, the udders brought down to a far less excessive size. Your work finally done, you stand with a sigh and wipe your brow.
It's not until your attention's brought away from milking the udder that you realize just how much milk ended up coming out. You're now standing in a puddle, one that's several inches deep and probably about two meters wide, and the liquid's managed to get into your shoes and soak right through your socks. Deciding that it'd probably be best to get out of those wet socks, and since you're done here, you give the cow one last friendly pat on the side and walk off home.