The mother seemed very honest during her interview with the BBC [1], not playing the "ZOMG I lost my husband and son!!!" angle, but I did think she might've done this to quieten all the "screw them billionaires, they deserved it!" crowd, by showing them that there are actually people grieving their loss.

Also I think she's only done this one interview. Even the question of "How are you?" was answered with contemplation, not hysterics...

1 https://www.bbc.com/news/av/world-us-canada-66016162