Taken Advantage of?

Do you ever feel taken advantage of?

I have a friend that I've known for years. We used to work together and have continued our friendship through her moving away, and moving back. The birth of her two children, followed by the birth of my two. We try to get together at least once a month for lunch. We used to get the boys together more often, but busy schedules have made that more difficult to do.

The other day she asked if I would mind watching her boys for a couple hours last night. She has a monthly church potluck and was without child care for her 7 and 9 year old. The potluck was to be from 6:30 to 8:30 ish. I thought, sure. Boog would love to hang out with the boys and what was a couple hours. I figured 6-9, as she only lives 15 minutes away.

Yesterday she called to say she would bring the boys by around 4:30. I asked "why so early" as I thought the potluck started at 6:30. The part she left out was that the potluck was at her house. She wanted time to get everything ready. She picked the boys up at 10pm.

I'm always willing to help out friends, but feel it would have been nice to get all the information up front. I feel as though I may have been taken advantage of. My husband thinks this particular friend is always looking out for her own best interest and does this often. I think I'm just nice, don't keep tabs on who keeps who's kids when, and just like to offer help when needed.