I am a regular posted but have NC because my DF sometimes lurks.
I'm a single parent to 1 DS my DF is a single parent to two DS. All the kids get along great. I have some family support but she doesn't have a lot.
I've travelled a fair bit in be past pre DS and with DS and it doesn't really bother me. When I first took DS I knew it would be abit of hard work but I wanted to go on holiday so we went .
My DF is very nervous, doesn't like doing much with her DC because she says she struggles on her own. Neither of her DC are particularly badly behaved but she's nervous and says she struggles with simple things like managing them at the park and soft play so she doesn't go unless me and my DS go so she has a hand.
She's been saying how much she wants a holiday but needs support for herself to mange the boys so we should all go together and then she'll have my help, I said I wasn't to sure what my plans are this year and might struggle financially this year. Anyway she told me to work out my finances and get back to her. I never brought it up again but a few weeks later she did, I said I still didn't know and a couple of unexpected bills I doubt I'd be able too. Then she got really annoyed saying she needs a holiday so I should try and get the money to go and said to ask my DM so she would be even more help with the kids.
There's no way my mum would go to help with someone else's kids, she likes my DF but not enough to want to spend 1-2 weeks with her and her kids.
I've told her unless I win some money on the lotto or something there's no way I can go even though I could manage a very cheap week away just me and DS she's got majorly pissed said well that's mine and my boys holiday screwed for this year thanks and hung up 
I think my DF is BU in only wanting me to go on holiday with her to help look after her kids and trying to get my mum to go for that same reason but she obviously thinks it's me
So WIVU?