An Aunt of mine has offered both my sister and I a house that she inherited. It has a value of €100,000. Both my sister and I are married and neither of us have used CAT allowances so I have suggested that my Aunt sign over the house in a split way with 1/3 each to my sister and I and 1/6 each to each of our married partners. The reason is to make use of the cat B allowances for my sister and I and the cat C allowances for our married partners. Is this OK or am I missing something. Later I intend to buy out my sister and her husband as they do not want to keep it.