Now for Wessex at this time, I'm not sure. The Danes escape me, but Viking & Celtic cultures are going to differ from "European" ones pretty quickly in regard to marriage and gender rights. Prior to the hammering of Christianity, Nordic women had comparatively ridiculous amounts of power in the home. Recent archaeological findings have also reversed the longstanding misconception that women were forbidden from going on raids or participating in the military. In fact, they did, and were venerated for it. They are depicted more reverently for their wisdom than beauty in surviving sagas, and if a woman desired divorce, she would get it with relatively less punishment, whereas if her husband initiated, he would usually have to surrender pretty much everything (land, bride price, holdings, &c) in order to walk away from his vows. You see this in Saxony and as far south as Burgundy, through the first millennium CE.

Here's a neat article on Icelandic culture:

The Icelandic law code, Gragas, allows divorce in only three cases. The first was if the couple gave each other "large wounds" or meira sar metiz (Jacobsen, Position of Women, p. 51), generally defined as those wounds which penetrated the brain, body cavity or marrow (Jochens, Icelandic Heroine, p. 45). The second was the case in which a couple was too poor to support themselves and had to rely on their familes for support, in which case they could be forced to divorce by their kin, or a divorce might be grabted "if one spouse with little or no money of his- or her own was suddenly charged with the support of poor relatives" (Jacobsen, Secual Irregularities, p. 75; also Jacobsen, Position of Women, p. 53), thus enabling the solvent member of the partnership to escape with his- or her goods safe from predation by in-laws. The third legal provision for divorce was if a husband tried to take his wife out of the country against her will (Jacobsen, Position of Women, p. 51). If one of these conditions was not cited, Gragas states that "no divorce shall exist" (Jochens, Icelandic Heroine, p. 44). This may be due to the fact that the redaction sof Gragas which we possess today have been influenced to some degree by canon law, for the sagas list a whole variety of grounds for divorce which are not mentioned in the law code.

And adultery:

A couple might also divorce for what modern courts would class as sexual reasons. If a woman committed adultery, divorce was the least of the penalties she might have to face, being also at risk for punishments ranging from fines to being slain if caught in the act by her husband in some parts of Scandinavia.

And settlement:

After declaring a divorce, the couple had to agree on a settlement dividing their property. As soon as the divorce proceedings were underway, the woman could take possession of all her property, no matter what the eventual outcome of the settlement (Jacobsen, Position of Women, p. 53). The division of property was arranged in such a way so as to penalize the partner demanding the divorce. If the divorce were due to equal poverty of the spouses, or because of mutual unhappiness with the union, then neither was penalized: the wife recieved her dowry and morning-gift, the husband took back the bride-price, and if they had commonality of property, the woman received one-third of their common possessions (Ibid., pp. 54-55). If the husband were the one who demanded the divorce, his wife received the bride-price, dowry, morning-gift, and one-third of any common property. If the wife had instigated the separation, she received only her dowry and the morning-gift. If any property dispositions had been included in the marriage agreement, these were followed in the same manner that pre-nuptial agreements are used today. By financially penalizing the partner who wanted the divorce, property division customs served to keep married couples together except in the most serious cases.

Basically, regardless of whether he still loved his wife, a cuckolded man would think twice about divorce because of the heavy price that came with it.