Did Mello and Lidner have a thing?

SHE has a thing for HIM but the feelings aren't reciprocated.

She even tried to give him some in the shower...Melz said...*crunch* and walked away...

I really don't know but he did see her in the shower O.O

If they did, it was probably just one sided, with Mello either seeing what Hal is doing and not caring or being completely oblivious to the flirting.