Hello
Thanks for query .
Based on the facts that you have narrated you are unable to achieve orgasm due to 
premature ejaculation that  your male partner is suffering from .
There are multiple issues involved in not getting orgasm and involves both the partners.
1) Your age 57.as the age advances there is natural for woman to have loss of libido 
2) 
Atrophy of vagina.
3) Reduced vaginal secretions .
4) Premature ejaculation problem of your male partner .
Premature ejaculation is very common problem both of you need to discuss it and can be resolved with mutual cooperation and following following measures 
1) Spend more time in foreplay 
2) Modify sex techniques like start and stop technique or squeeze technique .
3) Changing sex positions ,Woman on top position will help you to achieve orgasm
4) Your partner should  take 
Dapoxetine and 
Sildenafil before planned sex.This will help  to delay ejaculation.
Dr.Patil.