Yes, but the film doesn't advocate fathers leaving their children and wives. Infidelity clearly caused pain in the lives of EVERY character in this film, for many reasons, and it certainly is NOT saying infidelity is good or happy.
Then there's the other issue: that the infidelity was caused by the two gay men's tragic lives of being homosexual and in love with each other in an environment that never lets them understand what's happened to them. The simple and unfair response by too many is to say, "oh, they're just evil and gross, they should just stay married to their wives," -- as if they could do that so easily.
I think discussion about the film without actually seeing it is just... dumb. Or you can at least read the story.
The sodomite movement has a fundamentally adversarial relationship with traditional Christianity. Since the Bible will always define it as "abomination" gays, whererever they go, be it in the Episcopal Church, Catholic seminaries, Jesuits, Hollywood, will always use their position to wage a propaganda war against traditional Christianity. As extreme cultural liberals with an agenda of moral subversion they can do no other.
There is nothing to be gained from being "open minded" about it. We know what gays want and that is to make America as pagan and godless and degenerate as Europe.
The sodomite lifestyle is the continuation into our own time of late 70's coke spoon disco depravity. It is a culture of barebacking, anonymous sex in toilets, bug chasing, bathhouses, "bottoms", crystal meth.... Now, we have a film that is trying to "poitierize" this lifestyle and that is a lie that cannot be tolerated.
Is bisexuality an unusually difficult habit to break? More than drugs? Smoking? Overeating?
And who says life is easy?