C.C.
Hello there,
Not sure how to start this email but i do want to let you know this, it will all come in time (them liking you and wanting to be around you).
Now the reason that I say this is, I am 30 years old and my dad remarried a (now wonderful woman) that is 6 years older than me. I love her to death and I would do anything for her, but at first it was hard for me to come to the realization that she made my dad happy. It took me a long time to understand that she does not mean me any harm (or my kids). I now have a half sister that is 5 years old and its great.
But just know that in due time they will come around (we always do) I hope that this helps you! Smile because it will get better.