One of the few items we see that belong to Cinderella in her attic room is none other than a pair of silhouettes of her parents’ portraits! I think the fact that these are one of the few items she has to remember them by influences her far more than she knows. For instance, we know one of the only items she has of her mother’s is the dress her mother once worn. I think that might’ve given life to some of the knitting and designing and needlework she does later on (I said some because I know a brunt of it must’ve been a necessary skillset, as she would’ve had to repair Drizella and Anastasia’s clothing throughout the years).
But returning to the silhouettes...we see the importance of portraits in the King’s Castle in the scene where he’s showing the audience the paintings of his son throughout the years, and how one of the first was one of when he and the baby Prince were ever so close. I think Cinderella, being of an artistic nature, would take to painting in her later life after her children grow up because she wants to capture those around her. She loves realism in art, and she feels she can capture the spirit and essence she experiences from those people so dear to her both as a time capsule and to relive those beautiful moments, but in the back of her mind to preserve these connections and people in her mind should she lose them one day as she lost her parents.
I think it’s something she and the King would bond over, and perhaps it even started when her children were young and she painted them brimming over the King’s lap and his cherubic laughter at their innocent misbehaving.