He is thinking that as they are married everything passes to your mum, that means unless your dad has created a will with your mum that stipulates they should receive something you get it all.
that is something your dad has to decide, do you know if your mum’s parents have addressed this?
as he is terminally ill he must be thinking about his affairs and your mums security. If you feel comfortable doing this gently tell your dad you’re concerned about your mum being accused of being dishonest or you taking what should be theirs. He should tell his kids what his intentions are so they don’t contest anything.
once he is gone it will turn into a complete shit show and only he can stop it by clearly stating in writing what he wants and telling them it’s his decision.
my partner has just been through it. His grandmother left her 3 kids a 3rd each and the grandkids £5k each… the son died decades ago and so his children split his share, one son was left out… no longer speaks to us.
one daughter stopped working 10 years ago to look after her mother. She lived in a house which her mum owned, paid herself a wage each month and turns out she lived off £300k of savings.
she did a great job but after the funeral and all the hugs and promises to see more of each other she pulled out a letter saying her mum wanted her to get the house and all money!
Basically my partner who lives month to month and hasn’t had the best life was being told he should give up )35k and was making her homeless. The change in people’s personalities was unbelievable and went from embracing one day to ignoring each other in the street.
he’s coming over to have a dig about, he will convince himself that your mum has pulled a fast one and your dad would have given him something but she did something.
he should share his will/wishes to save your mum getting some unpleasant years and a lot of stress after losing her husband.
my mum and step dad have 2 kids each. My step dad is 13 years younger. When my mum dies he stays in that house and my brother and I get half of its value when he passes… if he meets a woman and moves her in he has to pay us for half the house. Same the other way. They told me when I was 17. Recently they made amendments due to my children being severely autistic as it could affect them if they have assisted living in the future. We agreed on the best way to help them and all is well.
speak to your dad quickly it’s inevitable if he’s terminal and your trying to stop world war 3