Gotten?

Coach Brower canceled practice for Tuesday, and can't remember why.  Tragic.  Simply tragic.  My sister went into the kitchen to make chocolate milk.  When she got back, it took me more than ten minutes to realize that she had gotten ice cream.  Is "gotten" even a word?  It makes me think too much about itself, it's such an odd word.   I looked it up in an online dictionary, and this is what it said: "a pp. of get. "  That still doesn't explain it!  It just doesn't sound right, I feel wrong using it; I almost feel dirty.
     My blind cat is petting me. I think she's hinting at something, but when I start petting her, she acts all surprised, like "Oh, you're going to pet me?  I had no idea!"  She's crazy, just like out other cat that isn't blind.  Then, there's the skitish one.  He can be dead asleep on your lap, but then out of nowhere he makes up and bolts out of the room!  What have we gotten (Really now?)  ourself into with these animals..