It seems that you may be having candidal vulvovaginitis.
There may be leucorrhoea
The fluid containing candida albicans , a yeast may caused the burning pain in your huband.
And the discoloration may be there on penis due to infection.
You should avoid sex for atleast 2 weeks.
Both of you take antifungal tablet for 2weeks.
Tell you husband to apply antifungal cream.
Both should avoid soap bath.
And take Sitz bath in dettol
Nothing serious, do not worry.
Still, you may consult dermatologist
Dr. Ilyas Patel MD