Inheritance via a trust from dad... moving into shared house with mum...?

[LovelySunnyDayToday]

We lost my beloved Dad a couple of years ago.
Mum put his half of their house in trust for me.
She's feeling sad living alone. So we have suggested selling our houses and all buying a much bigger one so we can live with her.
How does this affect the trust?
What's the best thing to do with the new house re: ownership?

Has anyone been in this position before?

Was the trust created because your dad willed his half of the house to you but gave mum the right to continuing living in it for a time ? If so it might be worth goin back to the will to see exactly what it says with regard to what should happen if and when the property is sold....

But I'm not an expert....

Take legal advice

Take legal advice. Too many things can change which makes it impossible to advise.
But you could die before your mum, your husband could divorce you and want half the property value, mum could remarry and her new husband could outlive you and kick you out of what is now his house.