Helllo lovely ladies

this is mainly out of vanity that I ask this.

We have a function coming up and I was wondering if it's all true about wearng an underside can cause problems for bf!!??!!
I only want wo wear it for one day and will still feed the baby durig the day too... It's just that The dress really need sthat support given by an underwire/pushup bra!!!

So what do you all think??

Thanks

Lisa