#Laenor sarcastically settles their argument with a 'good round six boys then'

[nogreatideaunpunished]

So given Rhaenys and Corlys's ages, most likely the first thing that comes to mind when they hear "Strong bastards" is Ser Lucamore Strong of the Kings Guard and three wives and his sixteen bastard children.

Especially given that one wife was sent with her children to be kept at Driftmark with Lord Daemon Velaryon. Given they fostered with Daemon Velaryon, Corlys's grandfather, he probably fostered along side them as the heir and future Lord.

Driftmark is full of bastard Strongs, but Laenor's babies are not the first to come to anyone's mind.