Girls are playful. We like the drama, we like to feel wanted,
loved, needed. We like to be able to say - "hey, even if it didn't
work out, we're still friends ma, can still be friends right?" It
makes her look magnanimous, and if the ex can't get over her, then
her ego is boosted and he is an even bigger loser.
Thus even if she knows very well that she is not interested, she
still wants to be in his life, and vice versa - wants him in her
life.
How should you react to the above? Well if you're secure enough in
the knowledge that she is sensible and fully committed, you may let
her have her source of ego trip and just b|tch along. Then again
why leave an opening for people to wreck havock, right? It's really
up to you how strict you wanna be about this, but keep in mind that
it's impossible to dictate what company your girl should keep...
she may still be in contact with them without your knowing. And
it's too tiring to be suspicious all the time. Bottomline is, for
this matter, better tackle using the soft method rather than hard
method.
Her ex sounds desperate and abit screw loose. Get back with him to
be a surrogate mother / maid? Just because he can provide
transport?? And a guy who's naive enough to expect things to be
same as past? Your girl would be crazy to take him seriously at all
. 
