Donnie absolutely loves Atomic Lass. That is not new information.

You, being Donnie's partner and knowing how much he loves her character design, decided to create a cosplay of her outfit to surprise him.

You worked on it for months. You made it all from scratch. The stitching and the modifications were made to both fit your figure and her curvy figure at the same time. You even got the large mallet down just right.

Donnie was oblivious to your work, as he didn't really ever go to your home to stay around. You normally came to the lair instead. It avoids unnecessary mutant-to-human interaction.

Today was the day you plan on showing it off.

You had told Donnie you were coming to the lair, a normal occurrence. He suspected nothing.

You made your way to the lair, being sneaky about it of course. Thankfully his brothers weren't there to alert him of your arrival. Partially because they are in the Hidden City, and partially because they also know about the surprise and don't want to spoil anything since they agreed it would be a fun idea.

When you arrive, Donnie was working in his lab as per usual. His shell was turned to you as he types away on his holographic keyboard and keeps his eyes glued to his screen.

When he heard the heel sound of your costume, he turned around in his rolly chair. You never really dress nice to hang out, so he was curious.

"Why are you wearing high heelsss.." Donnie extended the last word in awe when he saw your costume. His jaw dropped immediately.

"Good Galelieo.." He mumbles under his breath as his eyes look you up in down in bewilderment.