Eating out with another family

So my brother is sitting next to their daughter, and decides to charm her with his shy awkwardness: 

Hey...do you like lame jokes?

Uh, I guess haha.

I've got a joke about a sheep... but it's really BAAAAaaad. 

Oh really?  I'm sure it's not too bad.  I like lame jokes too and I laugh all the time.  I'm not good at telling jokes - my jokes are really bad. Haha.

Oh... ok... yeah... 

Me: HAHAHAHAHAHAH.

Biggest fail.