[Pearoak]

My wife has got three thong / cheeky bikinis.

One is more of a traditional thong: it's well fitted with plenty of coverage at the front, but tiny and crack hugging at the back, so there's not an inch of her cheeks that aren't on display.

The other two are tie string bikinis with adjustable front and back panels. They look best tied high with the panels pulled in tight, particularly at the front where the sides of her vulva can be seen at the most extreme.

But often my wife wears the stings loose and low, mistakenly thinking that wearing them too tight causes a muffin top. What it actually does is let the panels become slack, so I and anyone nearby regularly get to see, when she bends forwards slightly, a side on view of her gorgeous smooth pussy.

When she is lying on her front and chooses not to wedge the back panel up her crack, it moves about and is small and loose enough to partially expose her asshole depending on how she positions herself.