dating a Player / veiled threat / making fun of age

Hello,

I have been seeing this older women for a few years now. She is a college at work. She invites me out to dance and coffee dates.

I never had a very close "friendship" with a women like that.
She sometimes makes fun comments about my age, sometimes makes veiled threats that our friendship would be over if I don't confirm our plans for the week-end.

We work for the same school, we are both teachers.
She seems to see a "revolving" door of men, has online profiles on several sites.
She has told me so much.

She invites me to her birthday.
What should I make of it?

I feel that I am treated as a puppet on a leash.

Comments ?

Paul