excuses for why he objected to these people and not giving her the real story. I say that because he elaborated and got upset when she pushed him specifically about Sonny. In looking it that way, I prefer that he dismissed them with general excuses rather than get into a gossiping session about why these people suck or were cruel in some way to Robin (that especially applies to Carly and Johnny with his Lisa love).
The worst part is the most ideal people to ask would be Nikolas and/or Jax but so far it all seems like a plot point to ask Todd, who has no connection at all to this charity. Blah.