I like this topic. This thread will eventuality disappear into the dark gaping hole that is the forum BUT in the present moment I'm going to give my personal opinion to you, Mr. Goose.
First of all, thank you. Thank you, Mr. Goose for being so considerate about the concern you have for your lovely lady's time. Noted, that you not be concerned about the amount of time spent with her from her own vocal opinion of enjoying having you around her. But none the less, thank you again, for being considerate.
What you have there is a fine woman who enjoys your company. Or maybe she doesn't have a lot of clients, NEVERTHELESS, enjoy your time with her, dear. If she isn't making a stink about your lingering around, then you Sir Goose have the chance of getting to know her. Ask her questions! Ask her what her favorite colors are, what her favorite memory growing up was, ask her if she has any strange talents, etc. If you haven't already.
The best thing you can do while with her is, "Relax". Be comfortable. But I can see the gentleman side of you is still connect to the "Not wanting to owe someone something". In reality, that's a wonderful personality trait. I, myself, have that very same persona. When I am out with my ATF, he takes me places where we can enjoy each others company, places we can eat, and then again to another place where we can be social with other people, in all one day. He has treated me amazingly sweet since we started talking and I think to myself every time I see him, "Is there more I could be doing for him?". And then I do.
I am open with him, I am honest, when we kiss, I kiss him deeper. I kiss him like he is the only person I want kissing me. I desire him, and I try to show him that every chance I get. Then when it gets dark I like to take his penis out and play with him until he is gasping for me to stop. As my own lovely way of saying, "Thank you". I completely understand your concern. I think the BEST way you can repay her, as it were, is with your genuine affection. If she really likes you, then she will soak up your attention and give it right back to you.
Good luck to you both, I hope ya'll continue to have a wonderful time together!