Thanks for query,
To come in conclusion to know following 2 things are essential.
Age of your husband,
Has he had any surgical procedure in his urinary tract
If he is elderly then possibility of having enlarge prostate
After surgical procedure there may be incontinence
of urine giving rise to this problem.
There may be some problem of urethral opening causing incontinence of urine.
and get him physically examined and investigated.
Meanwhile he should wear diaper to avoid inconvenience.
Ok and bye.