Buffalo Bills quarterback Josh Allen and his wife, Hailee Steinfeld, remain as busy as ever despite announcing the birth of their first child last month.Steinfeld glowed in a black dress while attending Seattle Seahawks quarterback Sam Darnold’s wedding on April 3, where Allen served as a groomsman.“This was our first time attending a wedding as husband and wife (and mom and dad!) — and everything hit differently,” Steinfeld wrote in her newslet…