Your reason was Christmas. You said as much earlier.
As I said at the beginning, some people have a hard time with Christmas. Some people might even have trouble with people being nice / generous. I've had a couple of cases where people think something is up when I'm simply being nice or generous. Sometimes people are generous only so they can cash in on a favor later on.
Do yourself a favor and just drop this subject already and think about what was said. Think about how you approached the whole situation. The generosity is appreciated, but it's important to understand and accept that this is not an easy time for everyone and a little consideration and perhaps some forgiveness is in order.
