It's truly incredible what we're capable of when we overcome that nasty 4 letter word called "fear". To get things we've never had, we have to do things we've never done, and there's a certain amount of fear in doing something new. You learn a lot about yourself in these times.
That's great you got to spend two days in a row with your sister and little Sam. Sharing a meal you've prepared with friends and family is something special and a very satisfying experience.
That last picture of you and Sam is adorable man! Maybe it's time you and Bianca gave Sam a little company his own age around the house. :)