He knew he shouldn't have taken Kavehs coffee that morning. His chest was sore. And leaking. All from the stupid coffee.

In other words, Alhaitham was lactating.

Apparently, there was something on the coffee that made the person who drank it produce milk.

He could feel every movement of the fabric against his nipples. He could feel the wet spots from milk leaking. Hell, he was sore from it all. Plus, his chest was getting bigger to accommodate it! He felt like a pregnant woman...