I'll build a nursery

Though you've been afraid to ask any of the goblin girls directly, judging by the bulges in their ever expanding stomachs they are probably going to be birthing several children fairly quickly.

You walk a short ways though the stumps of trees you've felled for previous constructions until you get to the edge of the forest. Using your hatchet, knife, flint, and some rope, you're able to collect enough lumber for your new project withing several hours.

Increasing your pace of work you are able to strap together a frame onto the side of your shake as a second room, slightly smaller than the main room. By nightfall you have managed to strap enough planks to the frame to call them walls, and are able to construct a roof from conveniently overgrown foliage. For the door you simply have to untie some of the planks from what is now the inner wall, which helps you save on materials for the rest of the construction. Having finished just after nightfall Hera, Vera, and Sara gather into the new room with wide eyed, impressed looks on their faces.

While you worked to build the nursery the girls busied themselves gathering plush leaves, so now they are able to build the nursery into a cozy little nest, enviable of any infant.

Having Exhausted yourself with the construction, there is nothing left to do but grab a quick meal of some spare fruit before passing out in your cozy shack, the goblin sisters can be heard babbling to themselves quite fluently now in your own language as you pass into unconsciousness.