Marion began a relationship with Indiana Jones during this time (when she was 15, according to the novelization of In Search of the Lost Ark). The novelization of the film said that he was 15 years old when the adventure began, and that he was 16 or 17 when Indiana Jones left. Whatever the exact age of the characters or actors, it was clear that Indiana Jones was wrong to start the relationship, and he didn't do much to soften the blow when he fled from it. It is implied that Marion was a minor when Indiana Jones had a relationship with her.
In a recent interview with Uproxx on the occasion of the 4K Blu-ray release of “In Search of the Lost Ark”, Allen talked about the scene and how he never saw the relationship between Indiana and Marion start in a predatory way. Karen Allen, star of the classic movie In Search of the Lost Ark (198), has defended the age difference between her character Marion Ravenwood and her partner Indiana Jones, played by Harrison Ford. It's been 40 years since Indiana Jones entered Marion Ravenwood's bar and was punched in the face in Search of the Lost Ark, and in that time, a lot has changed in the way society views things like getting ready and having sex with underage teenagers. Marion has it, and in their first conversation together, after years of not seeing each other, Marion confronts Jones about her past affair saying: I was a child.
But in recent years, transcriptions of the story, the lectures between director Steven Spielberg, George Lucas (who came up with the story of Indiana Jones) and screenwriter Lawrence Kasdan, were spread on social media and revealed that there was talk of the two characters having a big age difference that could have had Jones in a relationship with Marion when she was a minor. In recent years, a specific scene from the 1981 classic In Search of the Lost Ark, which gave birth to Harrison Ford as the globetrotting archaeologist Indiana Jones, has come under scrutiny due to the age difference between Jones and Marion Ravenwood (played by Karen Allen), his love interest in the film.