...but how significant a risk is it?
She no longer works at your organization. Is there a chance she will work there again in the future?
Do you have a wife or SO that does not know about your sugar lifestyle?
Did she become personal friends with anyone at work? With any of your personal friends? With any of their spouses?
Do you typically take sugar dates to locations where you are (or she may be) known?
Do you think she has the emotional intelligence to keep a sugar arrangement separate from any mutual friends, coworkers, acquaintances?
What would happen if your social and/or professional group finds out you are dating significantly younger (but over 18) women? What would happen if that woman was the intern?
Has she seen your profile and contacted you?
Have you made "soft contact" by liking her profile without sending a message? That may allow her to decide if she wants to connect.
If all that seems like a math question you can't solve without more info, then either get more info or move on. Some questions may be better off left unanswered.
Life is good
The Cat