The choker makes it happen, seriously. Can't tell if it's an actual choker or a tattoo but that works for me, yep, but it does seem to be a tattoo based on the other pics, however.
Who knows? Slava recently did a photoshoot with Jay Lynch from Muscle Girl World. No sign of choker or tatt in the photos advertising the clips.
The choker is a sexy addition to her overall presentation. Most of her photos don't show it, so safe to say it's a removable piece