Perhaps. What you're probably not getting from your husband is attention and affection as well as sex. You need to work on that with your husband. Be helpful and understanding and work together. In the meantime, it's between you and your husband whether you and/or he getting sex from others would help or hurt your relationship. Keep an open mind, in my relationships (in a poly family) us having someone else to have sex with during a tiff with another actually helps a lot.