Possible breeding behaviour for unlikely couple?

[Gibbiceps]

I have an Electric Blue Jack Dempsey (4.5 inch) and one male convict (3 inch) in my tank, but the convict keeps following the ebjd everywhere, always swimming aside it, which is strange for me, since he's usually aggro. They just follow each other around all day, so I can only suspect some sort of breeding behaviour.

Is that a possible breed?

I know the fry would be very, very weak since its an ebjd, so I hope I suspect wrong.