It had being two weeks after the revolution ended, Annie had died,which affected Finnick alot,of course it did,it was her wife who died. You on the other side,you just didn't knew who to cry for,you had nobody even before the war,what affected you was that now you were free,after years of Snow using you and having you to his mercy,and now he is dead ...and you're 'free' but your body is all rotten and bruised after his abuse
While Katniss,Peta and Haymitch went to twelve you two stayed on District seven,away from everything,from the Capitol,you had been offered Snow's presidental mention as a compensation for all what you suffered but you couldn't be there,you couldn't handle it,so now,you're both on a house from the Victor's village,you sitting quietly as he sits as well while tying knots,just like he always did to calm down