Dance with a Stranger (1985)

Ruth Ellis lives with her ten-year old son Andy next to a night club. One night she meets David Blakely, and they start a love affair. However, for David with his upper-class background, it is impossible to uphold the relationship. He breaks up with her, something which makes Ellis, obsessed by him, very upset.

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It is also all a bit beta still, Sory about that.