This is just my personal opinion , u need to contact your second wife , find out if she has remarried etc , in my opinion if she has had sex with anyone else since u got divorced from her , then u r free from her and in a position to marry again . Once a spouse , male or female , has slept with some one other than their spouse , then the innocent party is free .
When u contact your second wife , try to b tactful about the information u require . Best not to just ask get straight out , unless she's a straight shooter and wouldn't b offended by the question . Maybe u could find out from one of her family members or friends ? Done one sympathetic to your situation . Hope everything works out good for u .
I just have to say
Authorized (King James) Version
Romans 7:1-4
7 Know ye not, brethren, (for I speak to them that know the law,) how that the law hath dominion over a man as long as he liveth? 2 For the woman which hath an husband is bound by the law to her husband so long as he liveth; but if the husband be dead, she is loosed from the law of her husband. 3 So then if, while her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man. 4 Wherefore, my brethren, ye also are become dead to the law by the body of Christ; that ye should be married to another, even to him who is raised from the dead, that we should bring forth fruit unto God.
I am talking Spiritually from God to us all through Son to be made alive, no more of flesh and blood.
We are not under Law any longer, I see we are to uphold law as in Romans 3 tell me at least
Thanks trusting God above it all