Yes but ofc, Perez won't let her do that
Nah, in the novel she paired Astana not with Tia but to other Lombardi girl. You can guess who...
No. At first, the Empress wants to pair Tia to Astana but Perez found out and make a plan not to let the empress that is why she attempted to engaged Astana to Tia's cousin but Lorraine fell in love with another man from the west. Tia and Perez create a plan to help her get away from the Empress grasp. They helped her to be with her person (also the reason why another business of Tia connected to ships become successful since Lorraine's man is basically the son of a noble family who holds business related to ships), Lorraine only returned when Tia became the matriach.
I have a feeling this bitch is gonna pair her son and TIA TO GET MORE POWER FOR HER SONNSO THAT HE CAN CLAIM THE THRONE