Even as a joke, that was poor timing
She said "How can you find that attractive, they're just skin and bones?"
when really she meant "I've got more meat on me, but I'm still attractive, right?".
Your reply gave her a resounding No, even if it was meant in jest.
Also, tubby funsters are usually touchy about their weight.
( Labia Majora You keep on talking but it makes no sense at all, Tue 4 Jan 2011, 16:59, 2 replies, latest was 15 years ago)

And even more touchy about cake.

( JeffTheDogFucker Can you dig it?, Tue 4 Jan 2011, 17:02, Reply)

Thing is, she's not even close to anything tubby, she's just not skin and bones.
She's very attractive.
( Agnostic Antichrist Baltimora, Tue 4 Jan 2011, 17:05, Reply)

still calling her tubby
in front of several very slim girls is not ever going to endear you to her
( Amberl was stripey and dominated Europe, Tue 4 Jan 2011, 17:10, Reply)

See, now you're just making me feel bad.

( Agnostic Antichrist Baltimora, Tue 4 Jan 2011, 17:11, Reply)