This is nonsense.
The lovers must decide: flee the timeline (usually impossible), fight (high risk), or accept a tragic separation. In AH romance, the happy ending is not "marriage and kids." The happy ending is survival with agency. Perhaps they escape to a neutral zone (Switzerland in a Nazi world). Perhaps they kill the high commander and live in hiding. Perhaps the story ends with them burning their identity papers and walking into the fog, hand in hand, towards an uncertain future. Case Study: The Fan Fiction Phenomenon It would be remiss to discuss "AH relationships" without acknowledging the fandom spaces where this genre thrives—specifically, Hetalia: Axis Powers . While it is a parody manga/anime personifying nations, its fan fiction has produced thousands of serious Alternate History romance stories. www sexe ah com top
And the romantic storyline provides the only acceptable answer: It has to. This is nonsense