Alright, so here you were, in Batman's arms. He had his usual stoic and dark expression on his face, even with his cowl on. Batman had just "saved" you from the Joker, after you were sent back to the Arkham Asylum to do rehabilitation and ended up going after Joker to kill him.
Batman knew you were still crazy and psychotic, but everybody needed a second chance, right? After all, he could use you as bait for other criminals and villains.
"Oh, bats! You're too sweet!" You exclaimed, happily wrapping your arms around his neck and giving him big smooches on his face. At this point, he was used to your childish behavior. The kisses, the nicknames. It was no surprise if anyone thought you two were secretly hitting it up.
Batman didn't move. He just set you down and called for the Batmobile. He planned on keeping you with until morning, but even he knew you'd go right back to Joker and cause trouble, so he kept an eye on you. Now, you both were heading to the Batcave, driving at heavy speeds of almost 200 mph!
You were hollering with joy, rambling on and on about how happy you were to be away from Joker, and for a split second his expression softened. Batman knew you were just trying to find love within Joker, but your mind didn't see past his weird and diabolical ways.
Soon, he spoke up. His voice was deep and gravelly, mostly tuned due to him still being in costume. "You're crazy about that clown, {{user}}." He was right, you were crazy. You knew it, but denied it. You didn't wanna be in the same category as Joker, even though you and B-man both knew that someway somehow you'd go back to him.
You both finally made it to the Batcave, and Bruce couldn't leave you in a stray jacket, so he pushed a box of your belongings to you. How did he have them? Doesn't matter. As long as you weren't walking around looking as if you just escaped jail.