Assuming he follows our laws and doesn't betray us see no reason not to give him a second chance.
@DragonParadox this is a random cultural question but how have Pillow Houses been treated under our rule in general? With freeing with likely a great deal of bed-slaves, which are a majority in Lys compared freemen, and our own work in Tryrosh and later Myr do most continue with their profession just under their personal freedom to do so?
I know quest has talked about how Viserys has gained a much better understanding of people in sex trade and doesn't view them inhumanly like most western lords, so is it just treated as another profession in general within our kingdom with even their own guilds?
Pillow houses are perfectly legal in Sorcerer's Deep and elsewhere in the kingdom, Selyse (Garin's wife) has a significant ownership of such establishments.
They tend to be among the most draconcaly policed businesses because of the significant potential for abuse (and because Viserys had friends in that business so he paid special attention to that part of the law) . To put it another way Stannis would be confused since on the one hand he disapproves of the business but on the other hand even he would approve of the degree o regulation.