The Kapamilya actor says in his guest appearance on the morning show Magandang Buhay on January 5, 2021: "Si Angelina, ang dami na na-release na mga kanta, 'tapos si Sam hilig din niya mag-artista as an actress. Meron siya shinu-shoot ngayon and nakikita ko mga post niya. Natutuwa ako sa kanya.
"And may mga friends siya na artista din na kakilala ko rin, so natutuwa ako that they're also part of the showbiz world."
Diego admits that he has to remind himself every now and then that his sisters are young women now, including Chesca, who is 15.
Diego's mom Teresa Loyzaga, who joins him in his guesting, says her son always reacts this way each time he sees Angelina, Sam, and Chesca's latest posts: "Sabi niya sa akin, 'Mom, they're growing up so fast. They're growing up so fast!'"
The young actor throws in, "Feeling old already kapag nakikita ko mga post nila."
Is he more protective of his sisters now that they are in showbiz?
The 25-year-old actor admits, "Oo, sobra...
"Siyempre hindi ko naman sila mapigilan, 'no? Puwede ko lang gawin, payuhan ko sila, and may kanya-kanyang buhay din naman sila, e.
"If I can give advice, if it helps them, okay."
Diego is aware he has no control over their actions.
"Ayoko rin maging kuya na parang, 'Don't do this, don't do that.' Mali rin naman iyon, mali rin naman iyon.
"And nakikita ko naman nag-e-enjoy sila, and they know what's right and what's wrong. I trust them."
Teresa interjects, "And they have a good mother that gives them good advice."
Their past with the same man has not stopped Sunshine and Teresa from building a friendship.
In fact, whenever they can, the two families will get together to bond.
And these are the moments when Sunshine and Teresa both relish their greatest achievements: their kids.
Teresa reveals in Magandang Buhay: "Alam mo when they're together, kami ni Shine nakaupo lang… sabi niya, 'Tignan mo mga anak natin.' Sabi ko, 'Oo nga.'
"Would you have thought that this day was going to happen? Na we just sit here and watch our children and ito na, grown up na, malalaki na sila. Tignan mo sila… They have their own world.
"And how nice to see that."