Does the following suggest that the wedding resulted in one wife for the bridegroom? Did he have more than one wife already? Did he marry again later? We don't know. It says only that Jesus and His family members attended a wedding, not how many wives the man had.
1 On the third day there was a marriage at Cana in Galilee, and the mother of Jesus was there; 2 Jesus also was invited to the marriage, with his disciples. 3 When the wine failed, the mother of Jesus said to him, "They have no wine." 4 And Jesus said to her, "O woman, what have you to do with me? My hour has not yet come." 5 His mother said to the servants, "Do whatever he tells you."
6 Now six stone jars were standing there, for the Jewish rites of purification, each holding twenty or thirty gallons. 7 Jesus said to them, "Fill the jars with water." And they filled them up to the brim. 8 He said to them, "Now draw some out, and take it to the steward of the feast." So they took it. 9 When the steward of the feast tasted the water now become wine, and did not know where it came from (though the servants who had drawn the water knew), the steward of the feast called the bridegroom 10 and said to him, "Every man serves the good wine first; and when men have drunk freely, then the poor wine; but you have kept the good wine until now." 11 This, the first of his signs, Jesus did at Cana in Galilee, and manifested his glory; and his disciples believed in him. 12 After this he went down to Capernaum, with his mother and his brothers and his disciples; and there they stayed for a few days. (Joh 2:1-12 RSV)
Also, does the following imply that a man can be married to only one wife at one time or does it speak to divorce only?
3 And Pharisees came up to him and tested him by asking, "Is it lawful to divorce one's wife for any cause?" 4 He answered, "Have you not read that he who made them from the beginning made them male and female, 5 and said, `For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh'? 6 So they are no longer two but one flesh. What therefore God has joined together, let not man put asunder." 7 They said to him, "Why then did Moses command one to give a certificate of divorce, and to put her away?" 8 He said to them, "For your hardness of heart Moses allowed you to divorce your wives, but from the beginning it was not so. 9 And I say to you: whoever divorces his wife, except for unchastity, and marries another, commits adultery." (Mat 19:3-9 RSV)
if it allowed polygamy, "marrying another" wouldn't be committing adultery.