Sweetie, I am not going to take anyones side. But want to tell you that when my dad found someone else and told our mother he wanted a divorce (they had been separated for 10 years and even though mom lived with him for a year with her trying to get back on her feet while my sister and I was finishing high school), she signed the divorce papers. She had moved out a year before. The lady that our dad married we never liked even though I tolerated her and so did my sister. We always thought she was selfish and wanted our dad to put her first before us. We knew she loved our dad and vise versa. We were happy our dad had someone and we went over there, well I had to cause I lived with them cause of our mom had passed away, but we still was around her. Just be glad your dad wants you around and he loves you and your brother and never stop loving him and spending time with him cause one of these days he may not be around. I did that after my stepmom passed away and my late husband called it Daddy's Day. And he told me the same thing I just told you. Never forget the special times you had with your mom and remember the happy times you had with her and your dad. That way you will always have good memories. Never remember the bad ones cause they will bring you down. Think happy thoughts. Let your dad (like my siblings and I did) have someone to hold at night to comfort him. That is what he is missing. Give him that gift. The Gift Of Love!