You're curious as to why they would leave you unguarded like this, but... well, you have other things to worry about right now. For example, your escape.
You let off a bit of a struggle, feeling that the ropes are far too tight to give way. However, as you do you hear a slight creak. This gives you an idea. You lean to the left, then to the right, rocking the chair side-to-side. Over and over again, each time forcing it to rock further, until finally it comes down with a CRASH, the aged wood splintering apart and leaving you bound to nothing. You stand and wipe the shreds of wood from your clothes, running out the front door of the shop and to freedom.
As soon as you're out, you find a nearby alley of sorts between two other shops off to the side and hide there while you check your "equipment". Pulling down your pants, you see a flash of bulbous pink latex. Oh no! She's gotten to your soldier! What will you... no, wait. On closer examination, you realize that the pink latex is actually a condom, one filled with your own semen, that the pig girl apparently applied with her vagina alone. You almost chuckle at the idea that those things would be worried about "safe sex", but right now it's not your biggest concern. All you want to do is get out of here.
Reaching down, you grasp the condom with your right hand and try to pull it from your member, only to have it rupture from the pressure and its contents pour all over your hand. Oddly enough, the substance that pours from it is pink, not the white you'd expected it to be, and the condom itself seems to be clear. Pulling your hand back in disgust, you try to shake the strangely-colored liquid from it, only to watch as it slowly glides down your fingers and palm, eventually reaching your wrist. You watch as the consistency of the fluid shifts, causing it to form a sort of solid pink glove. Finally, the glove seems to get slightly thicker, your fingers running together in pairs and all of the stuff covering your digits darkening while retaining a shiny sheen. When all of it finally stops, you find your hand now covered in a hoof-like glove, the two "fingers" and "thumb" all black and fairly hard and the rest a piggish pink, all of it slightly puffy. Your attempts to pull it from your hand end only in fairly - it won't budge. However, it at least seems to be fairly dexterous, and aside from the solid parts you don't appear to be impeded by it in any way.
Abandoning your efforts to remove the glove for now, you look back at the shop where you met those three creatures. You still want to escape, but there's a chance they have some way of getting this thing off you. The question is, do you want to risk it?