For sisters in the public eye, Beyoncé and Solange Knowles have managed to resist the siren call to overshare the minutiae of their personal lives. But there is one topic they are happy to gush about: their mother, Tina Knowles Lawson.

In the January issue of Interview magazine, Solange is interviewed by Beyoncé and waxes lyrical about how their mother “always taught us to be in control of our voice and our bodies and our work.” Last June, when accepting the fashion icon award from the Council of Fashion Designers of America, Beyoncé dedicated it to her “fabulous and beautiful” mother.

And in November, when Solange appeared on “Saturday Night Live,” a backstage video posted on Instagram, showing the singer carried by Mom and Big Sis, caused the internet to let out a collective “aww.”