Perspective needed for a niggling thought

[Earlybird]

I suspect I am being unreasonable, but would like some perspective from you lot please:

About a year ago, an ex-business associate (with whom I have a casual friendship) moved to town. He asked for some business recommendations, which I provided. Based on my recommendation, he hired one of my good friends (Anna - not her real name) to do a great deal of work for him. Their work/business relationship is ongoing, with one or two more very large projects on the horizon. The very large projects would take a couple of years of steady work to complete.

I went out for dinner with Anna a few months ago, and she was thrilled to share the news that the past year has financially been the best ever for her business (by a good margin). She acknowledged that what made the difference was the client I sent her way, and thanked me. I am thrilled that I could put the two of them together, and happy that their collaboration is proving so successful.

I have recently received a bill from Anna for a day's work she did for me in the spring (she said she's been too busy to do her smaller invoices 'til now). Somehow I have this niggling thought that the bill should have been waived and/or reduced as it is really very minor in the overall picture of the money she is now making.

So - what say you? Is Anna being unreasonable or am I? And if it matters, I have paid the bill and would never say anything to Anna either way.

Try to let it go. It was ungracious of her not to buy you a little something as a 'thank you' for the business, but the work she did for you was separate (although v. unprofessional to wait so long to send the invoice, imo). So, she's been ungracious and unprofessional. That's all. Her problem; it's not you who behaved badly, so let it go, forget it.

Different perspectives on a situation can be total opposites, can't they?

This client can potentially open up a huge market for Anna, as he is a leader in an industry in which she previously had no clients. He is by far her biggest client atm, and a few weeks ago she admitted that her business would be in the doldrums without him. He also is a larger-than-life charismatic character, so I know she enjoys working with him because it's different/exciting/fun.

Ultimately, I'm glad to have made the introduction, and happy to have played a part in a successful business relationship. I currently have no plans/need to use Anna's professional services, so we can go back to being 'just' friends without any complications - which I think is best all around.