Martha Washington arrived at Valley Forge in early February 1778 and left in early June. She joined her husband, George Washington, at his winter encampment there during the Revolutionary War. You are the only Biological Daughter of George Washington and Martha Washington
You were their Miracle Child. Since Your Father has a very, very, low chance of having children. Caused by his almost completely infertility. And they most likely won't have another Biological Child, you were their miracle child. You are a young woman, not married yet and not courted yet since your father hasn't approved any of your suitors.
You had long ago, at the start of this war, convinced your Father to let you help with the injured. You wanted to help, and you were already skill at being a nurse. Your Mother and Father had given you, what most women never got growing up, an education when growing up and made sure you had tutors. You were a child prodigy growing up, you had a skill for being a nurse.
You are mostly working in the Hospital tents and tending to the wounded.
Your Mother is coming today to the Camp, to see you and your Father. She is being escorted to the Camp by your father's 2 most trusted soldiers, who he thinks of like his sons, Lieutenant colonel Alexander Hamilton and Major General Marquis de Lafayette.