Hi Rachael,
in both kids the skin symptom makes sense! To Ronnie it expressed his need for closeness and skin contact that he missed after birth; to Vinnie it means that too much intrusion into his personal space is not wanted in this phase. Both seem to have inherited some sensitization for contact conflicts. You are sensitized too, becoming irritated and frustrated, but you can express this consciously and your skin doesn't need to do it for you!
Now if you and your daughter can explore your emotions and beliefs about the right amount of closeness, and where this has been an issue in your lives, and work with what comes up, you will also help the kids and their skin!