Did Abigail Adams have any other siblings?
Yes she had 2 sisters, Mary Smith Cranch and Elizabeth Smith Shaw Pebody, and one brother, William Smith!
The main purpose was for John Adams to go for the rights of women. Abigail Adams also didn't see John Adams for a long time so since they didn't have any telephones back then, Abigail Adams wrote letters to John Adams for women to be equal and fair just like men (women's rights in particular) which made Abigail Adams famous as well as a good written student full of interest.
Why did Abigail Adams send a letter to John Adams saying to remember the ladies when making new laws for the new nation?
The reason Abigail Adams said to remember the ladies when making new laws is because at that time, women didn't have any rights. They were just supposed to be the ladies who cook and clean. Abigail, however wanted to have the same equal rights as men. Since John Adams was president, most of the time he took in Abigail Adam's advice.