Setting out simply with best intentions is not always a guarantee of a happy outcome.
If she loses she will end up paying him a share of her property plus a proportion of his costs.
If he loses he will have lost any money he has invested plus he will have to pay a proportion of her costs.
Either way it may be an expensive lesson for them both!
If you are considering cohabiting or require a declaration of trust, to protect your wealth and future, contact us first.