Are Pretty Baby Massage and SBM linked?

[iwantamassage2]

As per the title, and if yes, then do the girls work across both shops, and if so, do they use the same names?

[buster]

They're not affiliated

[Labia Vortex]

SBM is linked to several other shops but not PBM

[HardCore]

They both have attractive and horny girls that will fuck you for money, could be that's the link.