Unfortunately, I am in this situation right now. Long story short, my dad was cheating on my mom with a much younger chick....she is not as young as me but is only about 6-7 years older than me. They have young children together(younger than my kids...his grandkids). My mom passed away earlier this year so know this chick is all in the forefront. I hate it...I dont like....I dont like her. She has secured her future by having these kids with my father..she is reaping the benefits of my moms pension and workers comp because the divorce was not yet final when my mom passed. I absolutely hate it but I keep my feelings to myself because that is my dad's life to live but I did have to go off when she wanted my kids to call her grandma.