Man confronts elderly mother about sending him away as child

This was a European film with subtitles. The mother sent the boy away to live with a rural farming family during the war because she was having a romance. The film begins and ends with him as an adult telling her about the pain it caused, and their story years ago comprises most of the movie.

Just a guess, maybe?:
ā€œĆ„ideistƤ parhainā€ (2005), also known as ā€œMother of Mineā€, a Finnish-Swedish movie

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