Haven't put too much thought about it since I believe they would be very cheesy with each other in any form, but like in a daily basis I think Viney is gift giver and also fits the acts of service category, she bringing groceries, taking her out to places, if Emira liked an specific flower Viney will plant them in their garden, if anything needs fixing she would repair it for Em.
Meanwhile I think Emira is very touchy and she loves holding hands hugs, rubbing her cheek on Viney's shoulder, casual kisses, doing her hair or fixing her clothes if they are going outside, those kind of things.
Also I think they are bery good listeners so you will always see them chatting around, very close and comfy with each other. Nobody invites them anywhere because that woul mean seeing them sitting on a corner and talking to each other forgetting whatever and whoever is around lmao.