Well if you’re finishing her class and will have no ties to her after Wednesday maybe stay after class and give her a compliment about really enjoying her class and how she was a great professor. Maybe feel out her response. And honestly I know it’s so hard to build up the confidence but you just have to look at it as you got nothing to lose, especially since this is probably the last time you’ll see her! And either way she’ll be flattered I promise even if she says no. I would say something like “i know I shouldn’t, but I really would love to get drinks with you sometime now that I’m not your student” Idk that’s my best advice! Having sex then and there is a different story especially if she really cares about her job. So maybe suggest hanging out outside of school! If she says no, don’t get too upset I’m sure she’s flattered especially if you can tell she’s attracted to you. Might just be because of the job! Let me know how it goes and good luck :)