I Have Just Had A Visit From A Friend Who

I have just had a visit from a friend who I think may be suffering from some kind of delusional paranoia. She has been divorced for 13 or so years and believes her ex husband is bugging her phone, sending men around to intimidate her i.e. getting into her house, following her, watching her from the street etc. I spoke with her for 2 and a half hours and at every point she came back to her ex husband and what she believes he is doing. She does have a tendency to be into all kinds of conspiracy theories etc, also. She has moved around from state to state (looking for work) and believes 'the Lord' has send her to where she is now. I believe she would greatly benefit from seeing a mental heal professional, i.e. a psychologist. How do I encourage her to seek this help without offending her or making her suspicious.