My sister is older than me (early 50's). She's on second marriage and has a lovely life, husband and family.
A few years ago - maybe 6 - my 2 DC we're staying with her in school holidays. At some point my daughter repeated a tale about my DSis being out on the town drunk with an ex boyfriend before she'd met her DH. My DSis phoned me in an absolute rage to tell me how she didn't want her children to know anything about her life before her marriage and how I'd betrayed her trust etc, I was absolutely heartbroken and cried for a few days at her being able to think I'd want to harm her. My trust in her has never fully recovered.
This weekend I was chatting to my DD about my relationship with my DSis. DD well recalled the conversation but said it was never me who'd told her this story in the first place but our mother (who has form for such things).
Given the elapse of time would you raise this with DSis? We don't speak much and are not on best of terms but I feel I want to clear my name.