How do you close the deal with a women in an LTR?

First I thought she was just flirty, but then I realized other women in LTRs also flirt but in a different way.

This one is extremely comfortable with me, lets me touch her, tries to be around me, and essentially looks up to me in many ways.

She’s a 28yo woman thats in a boring ass relationship, is lazy and would love to get some good dick.

Question is: would you escalate if the woman’s in an LTR? Most women that are gf material are already taken, so how the fuck do you approach the issue?