Harry potter help is there 2 endings?

ok i remember reading that damb book and i remember harry on a hill and i think holding his son in the future and he was a warder. well i also remember something in a news paper in the book or something saying something about the dursleys dieing? and it lead me to beleive dudley was a wizard and the new dark lord. me sister has the book and read it to me and there isnt anything i remember about the ending she read. can some1 clear this up for me plz :) thank you