My husband always sends messages to others.

Your intuition is right. If they haven't had a substantive relationship, it must be a bit ambiguous. I'll show you a trick. First, secretly write down this number and find out her name. Pay attention to your husband's movements and be aware of them. If he loves you very much and his life has not changed, let him be ambiguous. Men's tricks are all red flags at home and colorful flags outside. If he is not good to you, the change will obviously increase, and it is also effective to show his cards to him, because you just got married and still have a long way to go.