Well let's see...
Scott and Jean - marriage ended by Jean's death (as I don't remember them getting a divorce).
Captain Britain and Meggan are still married.
Hank and Jan have been married and divorced.
Black Bolt and Medusa are married.
Deathbird and Vulcan are married (sort of).
Professor X and Lilandra were married (sort of) and now they're not (well she's dead now anyway so that's a moot point).
Scott and Maddie were married until her death, plus they had Nathan who grew up to be Cable.
Whizzer and Miss America were married and had Nuklo.
Hulk married Caeira (until her death) and they had Skaar, plus there's the new She-Hulk who's the daughter of Thundra and Hulk (using his genetic material) AND it's alleged that the new Scorpion is the daughter of Banner and Monica Rappacini.
Mystique had Graydon Creed with Sabretooth, and Nightcrawler with Azazel.
Major Mapleleaf (II) married Puck (II) and they had a child (before they were killed along with the rest of Alpha Flight).
Guardian married Vindicator and they had a daughter.
Namor married Dorma (before her death) and then Marrina (and the jury's still out on whether she's dead or in suspended animation in the Master's ship) - plus what about the three children that Marrina was alleged to have when she became Leviathan?
Ares has Alexander as his son (with an unknown woman).
Quake is the daughter of Mr. Hyde.
Doctor Druid has a son Sebastian (aka The Druid) with an unknown woman.
Slingshot is the daughter of the Griffin.
Hellfire is the grandson of the Phantom Rider.
Stonewall (of the Secret Warriors) is the son of one of Marvel's greatest icons, we just don't know who that is yet.
Excavator is the son of Piledriver (from the Wrecking Crew) with an unknown woman.
Plus don't forget over in Avengers: The Initiative - Tigra is pregnant by a Skrull.
I can't think of anybody else off the top of my head.
I don't mind certain characters getting married, the dynamic can be interesting. Unfortunately, it often leads to a "women in refrigerators" moment, as apparently some people view "marriage" as the end of a relationship instead of another beginning, ie once the character is married there are no more interesting stories, objective achieved.
I do think that if the universe is to be heavily continuity driven AND in a more or less eternal now conceit that children and teen-age characters should be kept to a minimum. It was not Spider-man's marriage that aged a character, it's the fact that we know at least ten years has passed since he got his powers in high-school ie the marriage of Reed & Sue Richards, the conception and birth and aging of Franklin Richards. Since then we've also seen the kids of Power Pack also grown up to teenagers. In a continuity heavy universe, how long can you have a pre-teen superhero active and have all of these adventures and yet STILL have them be an in-experienced teenager? The more continuity heavy a universe is, the more you have to acknowledge in some way that time has gone by. To do that and maintain the characters being always in the now with little aging, you need as few markers as possible. An adult superhero has around 15 years to play without having to really acknowledge the passage of time in his appearance and the way he acts (trying to maintain a job, dating/marriage, etc). A college age superhero has about 6 years counting some graduate school and such, that you can acknowledge as having actually passed without changing his status quo that much. But, once you get high school and younger, there are pretty big differences for almost every year that has passed, physically and emotionally, a 15 year old isn't the same as an 18 year old, a 12 year old is not the same as a 15 year old, etc. The presence of kids works against the illusion of that balance between time passing and the eternal now.