Thank you for your question - can you explain some more about the civil action against her please?
Provided the house is in your name, your sole name and always has been (not owned jointly by the two of you ever) then even though your partner may live in the property, if she is made bankrupt or pursued by creditors, they have no claim on the house or anything which does not belong to her. The fact that she may live in the property is irrelevant. You have no more liability than any other landlord. The fact that you may have been living together has no legal status or the van landlord and tenant.
Can I clarify anything else for you?