Respuesta :

Martha did comfort Mary while she is crying after the latter believed that the slave had mistakenly thought of her as an Indian. Martha on the other hand, was motivated to comfort Mary because she felt a little frighten and sorry for the kid who cried so hard. 
Hey There



The answer to ur question is 

sympathy and kindness

That is Martha's motivation for comforting Mary while she cried 



Hopes this helps u :)