[quote=@MrDidact]
[@Puppy0] Yeah, totally you can have a son be the heir. I alluded to there being a Martell fighter named Oberyn who's helping to suppress the rebels in the Red Mountains, and you can have him be the heir if you want. 

Hmm, well for the Arianne situation, Aegon is always going to a dragon rider because he's the third rider from the Long Night (in this version anyway, who knows in the real story). Well, perhaps Aegon has a Paramour and his bastard children are dragon riders? Dorne is a bit looser about these things so Aegon can be married to Arianne but still have some sally on the side (damn you Sam!)
[/quote]

Yeah that would be fine, is there any other Martell children known other than Oberyn and Nymeria?  And is there any information that I need to know about them?  I am not really sure who I would be controlling now, maybe Oberyn and a few other of Ariannes children if possible then.