Truth be told, even though Maverick Mansfield may have been inebriated, his words meant a lot to Grace Gordon.
Even though Maverick Mansfield was Stanhope Brown's friend, from the start… he didn't instruct Grace to treat Stanhope well. It seems he treated Grace as his friend too.
Therefore, Grace didn't get cross with his words.
Grace Gordon smiled at Maverick Mansfield and said, "Drink less from now on."
"I'm fine…. Sister, I'm fine!" Maverick Mansfield was swaying dangerously and if it were not for Grace gripping him, he would have keeled over by now, "Sister… Brother Stanhope, you two must take care of each other! Truly… you both have overcome great difficulties! Being able to be together… means that you should both understand how precious it is, I sincerely bless you!"
George Harrison didn't drink much, he was chatting with Grace Gordon all along.