You suggest that the OP/DP should be careful how they bring the subject up with the ex, in an attempt to avoid future problems. But first thought is ?why should the OP and her partner bring it up with the ex in the first place?? It?s bringing an unnecessary person into the decision-making process, and I think we all agree that some ex?s can be very manipulative, and may try and twist the situation no matter how it?s approached.
As regards the DP?s father offering to pay ? the first post on this thread was the OP stating that they couldn?t afford to take DSS, so we have to assume that no extra funds are on offer from family members.
You?re right that some of the comments related to whether it would appropriate/desirable to include DSS (regardless of finances) and wanting to introduce the baby as ?her family.? I can understand this. In any family, there are little units within the ?main? family unit. And whilst DSS is clearly part of some of those units, I doubt the OP considers him as ?close family? in the same way she would her baby and DP. She didn?t give birth to DSS, she didn?t bring him up, and she doesn?t live with him. And even with the very best of intentions, and being fully accepting of DSS, the relationship she has with him won?t come close to the relationship she has with her baby daughter. I?m probably not explaining this very well, but I hope people know what I mean.
I also grew up in a step family, and we didn?t have an ?all or nothing? approach to holidays, it would never have worked. But if we?re not careful, we?re (yet again) elevating a step child to a position where he?s got more power than anyone in the household ? his ?right to choose? seems to have received greater support than the OP?s ?right to choose? ? and she?s the adult for heaven?s sake!
So with that in mind, I think it?s quite acceptable, given they?re already taking DSS to Italy on holiday, for the OP to leave DSS with his Mum when she goes to Oz.