My father 92 is leaving.?

My parents have lived with me for 17 years in spain. My mum died in november. Now my dad is returning to uk to live wih my sn of 32 and his wife 26. I don't get on with them over not bothering with us for the last 5 years. My father has written to them to ask if he can live with them and believe it or not they have said yes. Are they doing it out the kindness of their heart or for his money? He has 15,000 quid. However he said he is leaving me nothing after all these years. I am so hurt. i have tried to reason with him but to no avail. My husband says let him go it's up to him. Also he says I am getting nothing if he dies! I can't belive all this. I have access to his accounts and have taken nothing from him ever. I am tempted to take some money. I know it's wrong but I feel used. I nursed my mum for 5 years as well before she died. What do you think?