Is my dad right in this situation?

So here's the back story: At the end of last summer, my mother was diagnosed with terminal cancer and right now she is in her final days. A lot of people have been giving us meals these past few months considering the circumstances. Tomorrow is my birthday and this lady wanted to make me a birthday dinner. We told her it was fine and that we had everything taken care of, but she didn't listen. She went out of her way and bought salmon, rolls, vegetables, even a big birthday cake. My family has already made a cake for me so now we have two cakes. One of my friends wanted to do something nice for me by taking me ice skating. The ice skating rink is in an area filled with homeless people begging for money. I thought it would be nice if we could maybe bring the cake the lady brought for me, and pass out slices to the homeless people sort of like an act of kindness. Everybody has been so nice to us these past few months, I thought I would pass on the kindness to people in need. When I told my father this, he got really mad and said it was disrespectful to give away a cake that some lady went out of her way to buy for us. He said I shouldn't give it to random people Ii don't know or care about, and if Ii really wanted to give it away, I should give it to this lady that has been here for us the entire time. This lady is upper middle class, by the way and doesn't really need a cake. No matter how many times I explained my reasons for giving it to the homeless, he wouldn't let me do it and he just got angrier. Is he wrong in this situation, or was my plan actually disrespectful?