Absolutely not. I have children to my new husband aswell as my ex husband and that has no bearing on how much time my ex has with the children. My ex has our son 70% of the time whilst our daughter is a little more intermittent due to her age and mental health issues...she opts to go for a sleepover at Dads when she is feeling up to it. My ex husband does not have other children but that doesn't entitle me to more time with our kids than him. All the children have a good relationship even if they are not together all the time. I doubt she will be able to reduce Dads time for the reasons given