Her father is asking her for money to build a house for his second wife

Could you please tell me if a father is allowed to talk guilt into his children, because they are not supporting him financially. When I was still living home I used to work and give my father money. But now that I am married I have other responsibilities and also my husband is against the idea of supporting my father. We always argue about this.
My father has his own (good) salary ,but he wants to do a lot of things that require a lot of money, like building a house etc. (for his second wife).
(He got married for the second time to have a son, and this has hurt us and my mother very much). It felt like he was not satisfied with us (4 daughters).
He is always talking like we are no good to him, saying that other people's children are doing better than we do. This is making me very sad. I want to have a good realtionship with him, but I always feel very uncomfortable when he starts talking like that.
Am I obliged to support my father, despite the fact that he is building this house for his second wife and children? Are we responsible for all his borrowing from other people to realize this?
Am I allowed to go against my husband and support my father anyway?
Jazaak allah!