Yes I Have A New Relation Iam A 50 Year

yes i have a new relation iam a 50 year old male my partner had trouble having or reaching an orgasm she gets exited but not able to reach the end it has happened three times we are just starting our relation she feels that she has a proble i told her it may be stress on her part she is 49 years old and iam worried she is to decide that is her problem i think it may be some medical explanation can you help please