Is AUTHOR wrong in the post ? POST : Backstory: My family moved from Alaska to the lower 48. We sold our house for a huge loss and planned to rent until we could reestablish our savings and  financially swing the big move. My husbands family, however, was pressuring us to move sooner than later. So much so, that they offered to help us get set up. We moved, with basically what fit in the back of our SUV and they did help us get oriented. For that we were grateful. 

Around this time my SIL got a brand new dining set and showed up at our apartment with her old set. Again, we were grateful, but it wasn’t something we needed or asked for.  It wasn’t even something we were asked if we wanted. This was 6 months ago, and we have been making due with the table. However, this large round table, does not fit functionality in the dining area of the apartment. The chairs are tearing up the wall because it’s just too big for the space. 

Fast forward to today, I listed the table on FB marketplace for $100 or an equitable trade that would work for the space we have. If the table sold, the intention was to purchase a different table on the marketplace that would be better suited for the apartment. Well SIL saw the post and essentially lost her shit, and then had MIL texting me about how awful I am and how selling the table is terrible. She is apparently going to show up in the morning to repossess said table.

Here are my thoughts:
1. The table was gifted and is ours to do with as we wish. 
2. It’s not a family heirloom or really anything special it’s just a table.
3. We are not trying to turn a profit from the gift, only get another used item that will work more functionality in the space.

So reddit am I the asshole for wanting to sell or trade this table? Or should I have asked for permission?