Back to Lily and Marshall! So they buy the apartment because of Lily not disclosing her debt, and they find out it is in serious need of renovation (floor slanted), so Marshall asks Lily to sell the designer clothes she bought with her credit cards, and she reacts as above. She launches into some spiel about how she doesn't want to wear garbage, and that she can sell her paintings to raise the $1500 they need. Marshall lightly says that, well, it is hard to sell paintings for $500 a piece if you're not a real painter (as in, not professional) and Lily gets offended and accuses him of "never believing in" her