@IsItTooPink Is that the Vinted seller or your daughter in the dress? Sorry, but it squishes the wearer's boobs into pancakes so I don't think it's a good fit!
Pale pink + satin does tend to = bridesmaid as well. If it were pink but a different fabric, or satin in a different colour, either could work just fine.
However, that particular pink is also very saccharine & just not a great shade IMO. If it's not silk, then it would need to be a really good-quality synthetic for it not to look cheap - all those very pale pastel pinks/mint greens/pale blues look rubbish in cheap satins (& most other fabrics too, but then I personally don't like pale sugary pastel colours).
It also exposes too much flesh for a daytime wedding, even for a teenager/young woman. Maybe for a summer evening do - though I still think it looks cheap, but appreciate it just being one slightly fuzzy photo.
Even if your daughter were to wear a slip dress to a March wedding (they're only for summer ones IMO, with a jacket for the day part/ceremony), I don't think that's quite the right style. The 90s Kate Moss ones that have reappeared are looser (definitely not tight over the chest!!) & were/are based on 1930s shapes.
I will now apologise for my rather forensic put-down of the dress ... I'm just looking at it from a design point of view, as is my wont, & hope I haven't offended.
Pink does suit the wearer though. If your daughter likes that vibe, how about some of this one instead? It's a nicer shade of pink too (though my comment about the type of fabric still stands, so would depend on what it looks - & feels - like in the flesh).
It's still satin though - so to negate any possible bridesmaid vibes, I think accessories are key. Worn with a fake fur jacket, lace tights & sandals (which is what my funky art school goddaughter would wear to a smart do to impress!!), it could look really good??!!
https://www.marksandspencer.com/round-neck-midi-column-dress/p/clp22139176