Impa moved swiftly through the forest, using shadow to cover her tracks. Zelda slept on her back, physically and mentally exhausted. The poor girl had cried herself to sleep in Impa's arms many a night after her 'sentencing', and Impa just couldn't stand subjecting her to any more castle politics.
Shortly after that terrible meeting, there was a state funeral held for Zelda, with a fake body inside the coffin. The real Zelda was confined to her bedroom, until the middle of the night when she was shunted away to the cabin in the graveyard. Her survival of the poisoning was decreed as fate, so the council didn't dare kill her. Instead, she was to live the rest of her life there in hiding with her child. Zelda and Impa were warned by the royal advisors that if anyone found out Zelda was alive, anyone at all, they would punish Zelda in the worst way imaginable. Fearing they would hurt the baby, Zelda complied, though she fell into a deep depression.
It took a month to plan, but in a clever feat of Sheikah skill, Impa had convinced the king and advisors that Zelda suffered from the same pregnancy ailment that her mother had. An ancient spell from beyond the Sand Sea provided a lifeless yet accurate shell of the princess, and Impa presented it to the king with all the emotion of a mother who had lost their child. They bought it, and laid the effigy in the empty coffin they had paraded around at her state funeral.
The Sheikah general was bound to remain in service of the king, but she was entitled to a period of mourning as Zelda's primary caregiver. Under the guise of returning to her birthplace of Kakariko, Impa departed the castle and located an abandoned cottage deep within Ordon Forest. It was an ideal hideaway- nestled in a small grove, near a pond and stream, and far enough from Ordon Village that it wasn't easily found yet close enough in case of emergencies.
Zelda woke just as Impa arrived at the cottage. "Where...?"
"We are about a half day's ride from the Hylian border, in Ordona Province," Impa said as she laid Zelda on the bed inside. "This cottage is nestled in Ordon Forest, safely tucked away from any village paths. The surrounding glade is accessed via tunnel, which I will cover with ivy. No one will find you, you will be safe."
"...What about food?"
"I won't lie, you will need to cultivate the majority of your diet. But the land is fertile, you have easy access to a stream, and the waterfall pool just outside the tunnel is an excellent source of fish. I will also make sure that you get a cow and some cuccos."
Zelda processed the information for a nearly a minute, then began weeping as she clutched at her now visible stomach. "Wha... what am I going to do? I can't... it'll hurt the baby..."
"Oh, Zelda..." Impa sat beside Zelda and rubbed her back. "I'm not expecting you to be out tilling or fishing while you're pregnant. If you're like your mother, you will have to stay in bed for the later half of the pregnancy, so you need easily prepared meals. I've already stocked the root cellar with enough dried meat and vegetables to last you a year. I plan to check on you every chance I get, but you should be fine until the birth."
Impa withdrew several pouches from the kitchen cabinets, and explained their contents to Zelda. They were potions and herbs divided by week, prepared in order to sustain the baby. Neither Zelda nor Impa knew how the poisoning had affected development, so Impa decided on formulas that encouraged healthy development. Zelda would have to soak the herbs in the potion and drink it down, in addition to her regular meals.
Overwhelmed, Zelda curled into a ball and began crying for Ganondorf. Impa sighed, and tucked her under the covers. She hummed Zelda's favorite lullaby until the crying became the steady breathing of sleep, then fetched a cool washcloth for Zelda's forehead.
"Goddesses, please grant Zelda and her child your protection in these coming trials..."