And yes! It would be great if the two knew each other. I have on her app that after her husband's death, Zita needed help and got support from people through various means. Maybe Lucia helped run or look after the tea shop/lounge for a while so it'll be less stressful for Zita at the time? Zita would be so grateful for that sort of support and feel both grateful and indebted to her as a result.
But I definitely can see Zita dropping by Lucia's own boutique to asking for help help in finding new outfits for parties/catching up with her in general/asking for help with her fittings and measurements hello. She's been part of the family for a while so will it be safe to assume the two of them have gotten the time to know each other? Zita would admire Lucia a lot for her strength and her ability to stay calm under pressure. And also finding her extremely pretty and doing her best to not look or act ridiculous around her whenever they meet up for anything and everything.