Mathias’s claim that Barabas will “wrong’st [him] much” if Barabas doesn’t allow Abigail to marry him implies that Barabas has already promised him Abigail’s hand, and Barabas obviously doesn’t have a problem going back on that promise and betraying Mathias
and Abigail. Here, Barabas puts on quite the act to convince Mathias that Lodowick and Abigail are in a relationship behind his back, and Mathias easily takes the bait. Barabas’s plea that Mathias will not fight in his house if Mathias “loves [him]” is certainly ironic. Clearly, Barabas loves only himself and his gold, and he will sacrifice anyone for his wealth and revenge.