Had a missed call from W, so called her back a short while ago.
Expecting the usual child related call, in fact she wanted to know what I was doing with the concert tickets I mentioned the other day. I said I didn't know, hadn't thought about it. She offered to buy them from me. Not wanting to make a spur of the moment decision I said let me think about it. She got a little stroppy and said 'forget about it, it doesn't matter' and couldn't really get off the phone quick enough.
Then no need to call or text her back at all. If you need the money, then put up an ad on CraigsList (or the UK equiv) and sell them, and if she asks you about it, say "Well you said 'forget it,' so I sold them to someone else."