Mary Tarith smiled at Max, while Nico took the opportunity to move behind him to surprise her mother. With what she was wearing, her thought was that her mother wouldn't know until she revealed herself.
That was never actually a possibility, as Mary Tarith had a System Function that located her family members when they were nearby, so instead of hiding, Nico's movement only made Mary take an extra step to pick the little Cyborg up in what would be a bone-crushing hug to others.
"My baby girl is back. I've missed you, and you're so adorable. See, pairing you with Max was exactly what you needed. It took some time, but now you're the cutest daughter that any Tarith could ask for." Mary gushed as Nico gave Max a resigned look and let her mother swing her around in the air.