User blog comment:The Dragon Demands/The History of House Targaryen. Part IV: The Dance of the Dragons/@comment-1164470-20131103111402/@comment-5014364-20131103194746

We do not know who Aenys was married to, but it is stated that she was *not* a Targaryen. Aenys didn't want to anger the Faith by continuing incest practices -- Maegor didn't care, because both Aenys and Maegor were already the product of incest (Aegon/Rhaenys/Visenya) and would always blame them for that.

Aenys's wife may have been a Velaryon, but this is pure speculation (they did prefer to marry into House Velaryon if there was no daughter in the current generation).

Aenys rode a dragon named "Quicksilver", who unusually has not been mentioned in the Dance.