I didn't buy the orange wrap top (I agree with @Liz that it's too tight all around - I agree with @Vildy that the overall fit in general is OK but I do need a bigger size, & unfortunately that was the last available one, lol). But I just wanted to say that the orange tunic actually was a thicker ponte sort of fabric, yet I still got that pulling around the butt. (Like @RachyLou's test there wasn't any belly button indentation, but my stomach just stuck out a little in it).
I think the S curve is just something I'm going to have to embrace - not really a 'problem' as such, since big butts are finally in lol! Also, I realise now in retrospect that asking my partner whether the tunic fits OK was a bad idea, since of course he WANTS to see the outline of my arse & was therefore going to approve it, lol! No worries, I can maybe wear it with one of my long open cardigans to hide the back view a little (can't scroll up to see who said it, but this may also help with the length issue that someone mentioned - since I've been dressing as a pear for most of my life, I often employ the long over lean look (long & slim open layers for vertical integrity, with leggings or something similarly tight on the bottom) to keep my hips in check.
Also, I've tried higher end bottoms & pencil skirts and I still get the same S curve issue. I don't think I want to fight it anymore. I tried tailoring my bottoms so that they nip in at the waist, flare out over the top of my bottom & then just hang straight down from the widest point (as opposed to going back in), but that actually ends up looking frumpier. I literally look like I'm wearing a bustle if I don't show that my butt goes back in underneath, lol!
I think this may be because I often go for high waist bottoms to help highlight the natural waist & girdle my lower section in (not normal or low rise). I can't really follow traditional apple figure flattery advice because I have a defined waist & two-pack up top, along with no love handles. This lower belly pooch is new though, & therefore something I'm trying to figure out how to camouflage because I'm not used to it. If I go for a normal or low rise, whilst I don't have love handles, I do end up with muffin top overspill from the lower stomach area.
The lower belly gives me problems with belting sometimes, too, even though pears & hourglass shapes are supposed to be well suited for it - if the belt is very wide (almost like a corset) I sometimes get lower stomach spillage from underneath the belt too, lol! I'm not sure what's happening to my body & weight distribution - it might just be age, but also switching to a desk job & maybe my diet isn't as great since I moved abroad. Either way, I wear some light body shaping shorts & do go to the gym regularly when I can (hence the two-pack just below my bust), but I just can't get the lower belly pooch to move, lol!