Yes Theo rejects and slaps Seth, stating his reason to be that they are enemies, they will go back to being enemies. He believes Seth should lead the revolutionary army to get his country back and reconstruct it since he is a prince. He also says Seth has lost pride in his name and that man like that can't be the father of his child nor his capri. In the end he tells him not to lose his pride. Basically enemies to lover angst.
While they don't get together for in the chapter, Seth does talk to the magician or smth white hair guy (forgot his name) who basically just tells him that Theo's decision was to keep Seth and the child safe since there is just so much he can do to hide Seth.
Anyway the chapter ends up with Seth apologizing for being too quick and asking him to promise something (chapter ends there so idk what that is yet)