I've been with DP for 4 years now, he has 2 children ages 10 and 12 who live a few hours away, I have 3 children who live with us. Later this year I'm planning on paying for a family holiday for most of my family. We haven't all been away together in years so I thought it would be nice. DP mentioned that his children are going to feel left out and then ended up suggesting I pay for them to come too. He earns a lot less than me and wouldn't be able to afford to pay for them himself but the amount I'm already going to be paying is a lot and I don't know his children all that well. I see them a few times a year, the rest of my family have only met them a few times. They're lovely kids but I don't think I should be expected to pay for them