It's not a sin and God surely is not going to stop loving us if we don't have kids.
لا تياسىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىى ىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىى فرج الله قريب من غير عمليات