My dad met someone else about 7 months after my mum died and they had been married for 30 years. I found it very hard to begin with and looking back may have been a bit off with her, but never intentionally rude. I was more upset with my Dad who hid it from me to start with. I still lived at home then (my 3 brothers didnt) and she moved in after a couple of years. Our relationship is much better now I have my own house and they have been together over 7 years now. She is actually 5 years older that my dad and had her children quite young, so her daughter is around 13 years older than me and her son 11 years older, we don’t see them much which is fine by me, I’m not particularly fond of her daughter. It is such a hard thing but at the end of the day I just want to see my Dad happy.