Just picked up on this thread....
From a personal point of view, this girl is in a very unique position in relation to other service providers, she has made her position fairly clear, she is working between "working" and "studying" she offers quite an experience for those who manage to get the opportunity.
This lady has a USP which other girls can only dream about
she could fill her availability many times over, but has chosen not too.
I must admit, her comms at times can be difficult, when I was recently in Tanya's company I soon became aware of her popularity, she doesn't make lite of her phone going into meltdown nor the significant number or random/ freaky daily email contacts, she needs a call centre, not a PA....