someone posted a photo from the Hackney party and I can be seen in the corner

Photo on a public Instagram account. 'Vibes from saturday' caption. 2400 likes already. It's a wide shot of the dancefloor at the Hackney warehouse thing on the 4th. Foreground is fine, two friends posing. Background, slightly out of focus, is me. Kissing someone who is not my husband. You can see my face. Not crystal clear. But enough that my sister would know. [F33] me, [M35] him, east London, married three years, lifestyle eight months only, baby due in November oh by the way that's a new thing too. I have messaged the account three times. No response. I have reported the post to Instagram for 'showing me without consent'. Nothing yet. My husband is being calm about it which makes me want to scream. He keeps saying 'it'll cycle out'. My sister follows that account. I don't know if she scrolls properly or just likes the stories. The bus outside just did the air-brake thing and I jumped. Anyone had a photo go semi-viral with them in it. What worked. Lawyer? Just wait? Tell my sister first before she sees it? OP here is freaking out a bit tbh.