You hardly seem to care about that. [And once their fires touch Axel can feel his own reacting, hissing ferociously and trying to overpower Wolfram's own, but afte a while it seems to settle and adjust to the intuding element. It feels kind of comfortable, actually, combining their powers like this, even if it's for something as silly as melting sand.]
Wouldn't be surprised if you'd like to burn the whole place down.