Hi, you have doubt on your husband. You don't know the fact. Lots of Gay test is available. It can be tried

Hi. Undergo assessment and further guidance

Sorry to hear that madam, my point of view is, being same sex lovers(gay) still they can also satisfy there partners . If anything wrong in taking care of the spouse that should be seriously addressed. There are so many things to be taken in concern before suspecting this issue madam (Like sex knowledge for both individuals, sexual interest level between two, understanding between two ,marital discord should be eliminated before this, plan regarding child , financial issues and physical issues should be addressed before this ,interest in foreplay, fetishism ) etc etc etc can't explain in public forum madam.

Get him to the counselor, do not try from your end

It is better to consult a psychological Counselor for a therapy personally to seek guidance on those sensitive informations..

Hi.. Did you tried talking to your husband at the first place? LGBTQ are normal people with a different taste/preference when it comes to sex and romantic relationships. There are no such hints. Please consult a Psychologist for your own Counselling as you are going through a serious doubt and if it is true then you need someone to guide you through this challenging situation.