[saturninus.ribb]

As Buddhists we should always see ourselves as lower than the person we are dealing with. Right speech should reflect the utmost respect we have for all beings and the compassion we feel for their suffering. As Aloka-D has said you should reply that you don't believe in the devil yourself but to wish her all the best and tell her you are happy that she has found someone like Jesus to rely on. There is no point in telling her too much about your own faith or life philosophy unless she asks, and if sh does you should be as honest as you can with her without hurting her feelings.