E.L.
I am also very sorry to hear that your family is going through such a difficult time. I just wanted to reply to please ask that you do not tell your daughters that their Uncle is on a trip, vacation, etc. It can be very confusing and damaging to lie to children even in the interest of it being "easier" for you and them at the time. It is better to explain that they do not live together anymore and as the children ask more questions, and get older, you can provide more age-appropriate answers to their questions. I provide outpatient mental health counseling to children and families and have found that being truthful in an age-appropriate manner is the most beneficial. It sounds to me like this is what you are planning on doing and just wondering how to go about it. So when your 3 year old asks, I would tell her that her Uncle and his dog do not live with her Aunt anymore because sometimes people do not get along with each other and so they decide to live apart. I would also reassure your daughters that your (immediate) family is not changing and both their Aunt and Uncle love them no matter where they live. I hope this helps and kudos to you for wanting to do tell them in the right manner.