Relationship DNA testing can be a life-changing event for those involved.
If you find that any person requires extra support to deal with the outcome of a DNA test, then there are a number of online resources for support with this:
npefellowship.org  The international organisation, the NPE (Non-Parental Event) Friends Fellowship provides emotional, educational and practical support to those who have discovered that one or both parents were not their biological parent(s).
bps.org.uk It is always recommended that people speak to their GP or support worker for advice before reaching out to a phycologist. If families do need the services of a psychologist, then they can do so through the link provided.