Background: GM is a friend of a college friend of mine. We are casual acquaintances but still friends on FB. HB6. I had to delete her from Facebook since my exGF was jealous of her (weird!) but added her back when I started dating J. She is in Italy. I am in California. Apparently has a boyfriend.
Last night she put a new profile picture of herself with a tank top that showed a lot of cleavage
This is the convo that followed. Initially as comments to the picture
Seagull "M, cover yourself up"
GM "Seagull, mind your business

"
Seagull "Not funny!"
GM "I guessed. But it's not a very naughty picture, come on!"
Seagull "Those will come on the weekend!"
GM "You can find a hundred or so in the "Portraits" section. Obviously, they are ARTSY pictures with no vulgar stuff in them"
Seagull "Thanks for the hint classmate. And (obviously) sexy != vulgar"
GM "OBVIOUS! Needless to say, no such album on my profile. But I may end up making it. Kisses!!!!!!"
Seagull "What? Does not exist? I had believed it!! I shall go back to my place heartbroken"
GM "Eeeeeh I know I know. I am not a well behaved girl. Be patient"
Seagull "Miss M, give me a good reason to be patient with u

"
GM "Do not call me M. Call me Gigì. I am starting to create my character..."
Seagull "You got the right boobs....

"
GM "ahahaha, SEAGULL!!!"
Seagull "What?"
GM "I am blocking you!"
Seagull "You are being bad

"
GM "Obvious"
Seagull "OK, next time I will write this in private mail so you won't misbehave"
GM "This is overly daring! Shame on you"
And here I send her a PM:
Seagull "As I was saying... Cover your boob miss Gigì"
GM "Whatever. Not much to hide. I am not that curvy. Blocking you nonetheless"
Seagull "For saying boob. Or for saying to hide it?"
GM "Silly question. The latter.... Kidding!"
Seagull "Then show more of it"
GM "I AM LEAVING"
Seagull "Going to take your bra off?"
GM "To study! Advice: cold shower! LOL! Have a good morning"
Seagull "Good night you mean"
and she also wrote a comment to the pic "Let me go to study. Hi from Gigi (who's a vamp not a porn actress, since sexy != vulgar!)

byeee"
Question 1: feel free to critique this convo and provide ideas for improvement
Question 2: I would like for this to evolve towards sexting. Not a huge deal if it does or not, but I think it would be fun. How do I tackle that? I was thinking to see if she opens back. And if she does not, in a few days to open with a variation of the dream routine where I say I had a dream about her alter-ego Gigì.. and see where it leads. Any better ideas?