Responses
Okay, its basically that if the Grandmother was pregnant that means Marissa wasn't Marissa Orsini but Marisa Sorolla therefore ownership of the painting gets more complicated, also it'd make Marissa a 'bastard' which adding to her prior reputation, it isn't good. Luca doesn't care about the emotional side (he does) but the mess of ownership that will follow and Dojin is trying to be sensitive about what is a really sensitive subject but his ambition wins out. So hiding that Grandma Orsini was pregnant at 18 with a man 40 years her senior's baby has to be hidden.
You guys, I'm confused about why Luca and Dojin are unsure about the painting and his gma being pregnant in the painting. I don't understand the correlation with the Sorollo foundation and everything too