OP, if she calls you again to help her, go over again, but this time have a receipt ready (or write it afterwards) for your service. This time, when you go in, you take the charge and try to kiss her (since you're not probably very good with reading body language and desire and all that). Go for it. If she resists even a kiss from you...she doesn't want you even one single bit. Give her the receipt and leave.
A friend showing up suddenly after years who needs your help LOL
A girl I banged for a couple of times resurfaced after two years in my life. She apparently wanted "photos for her brother's wedding". I saw right through it, gave her a price and in no time started flirting with her. She told me quite some and we even got to the point where she said she wants me to go over at her place and take some of pics of her alone there. Then she backed off and blocked me again on Instagram where we were talking LOL
A couple of days later I casually see her on the street, she stops and salutes me (hadn't seen or heard from her in 2 years, don't forget that, but she was crazy about me those couple of times we banged, I left her cause she became too clingy). She kissed me in the cheek, but it felt like she wanted the lips, it was rather passionate. She then told me she's working at a massage center now and when I asked her "do you do happy endings?" She said "for you...it would be 200 bucks" (that's an entire month's wage for many people in my country).
Never saw here since or talked to her. OP, point being, stop facking around, if you wanna bang her, go for it. If she refuses, get out of there and never even entertain her unless she wants to come over at your place. Done.