In the 4 book in twilight why does Edward Cullen wish Bella Swan was pregnant?

Because Edward Wanted To Make Love With Bella, And Make Her Pregnant; But He Is Worried He Would Hurt Her In Any Way, But He Does Make Love To Bella In Breaking Dawn But Bruises Her, But Bella Doesn't Care. They Do It For A Second Time, This Time Breaking Headboard And Making Bella Pregnant.