Altruism, or something else?

Mama – well, that’s what everyone calls him – works as a security guard at a shopping mall. Near the mall is an orphanage on a vast tract of land with many trees. Mama’s son was working as a gardener at the orphanage.
One day, the son was high up on a tree, trimming its branches when he lost his balance, fell down and died while being rushed to hospital.
Even before he could be cremated, the orphanage management offered a sweetener to Mama – they would take care of his grandson’s study, clothing and food expenses till he graduated.
“How magnanimous of them,” declared one half of the people who heard the story.
“Oh, they just protected themselves, fearful that Mama would blame them for his son’s death,” said the other half.
So, what do you think, was it just altruism, or something else?