Its obnoxious of her to keep pestering you on this. You shouldn't have to feel embarassed and you definitely don't owe her anything on this matter. The fact that she doesn't respect you enough to lay off is the bigger matter at this point. I'd have flipped my lid by now.
So, so you think you can tell Heaven from Hell,
blue skies from pain.
Can you tell a green field from a cold steel rail?
A smile from a veil?
Do you think you can tell?
And did they get you to trade your heroes for ghosts?
Hot ashes for trees?
Hot air for a cool breeze?
Cold comfort for change?
And did you exchange a walk on part in the war for a lead role in a cage?