Estinien shrugs helplessly, already resigned to the complicatedness of it all. He's certainly learning some things from this conversation - including that both Jaskier and Geralt's feelings for the woman may be even more complicated. There's that sort of energy to the situation.

"Only if it were her that stood in my way," he clarifies - though Jaskier's description of her isn't exactly flattering, he hasn't set his mind on vengeance against her in specific. "Shame she doesn't pay Geralt as much mind as he pays her."

So, he's gathering that Geralt actually is in love with the woman but is not in a situation where he can have any expectations of her. A sorry place to be, truly. He wouldn't have thought he'd come out of this pitying the man. If Estinien were to fall in love with someone, he imagines that them not being a huge pain in his ass would be an indispensable feature.

Though maybe it's arrogant to think that, given what his friends are like.

Estinien doesn't actually have any suggestions regarding what he's going to do in particular about Thorne either - it's more the general sense that he'll do what he has to when the opportunity arises.

As for Jaskier's warning, Estinien scoffs.

"I assure you, she wound enjoy my full attention no more than I would hers."