howandwhy99 is exactly right up above ^^^
Zogg, Darkness's advice has been great in this thread. I would echo some of his statements, especially that the wizard is just too high of level, and should be rectified (I think the fairest solution is to knock him down some levels).
The DM screwed up majorly when she allowed the wizard to gain THAT many more levels than everyone else. I don't care what caused that inequity - it doesn't matter if the wizard singlte-handedly slayed a dragon to get that much more XP than everyone else - it never should have been allowed. She should fix it... PRONTO. It's not a world-changing fix, it won't affect the story, it only affects one person if the wizard is bumped down to level 9. That one person will still be more 'powerful' than anyone else, so he should have no problem doing that to help the party.
Don't try to change things in-game.
This is an OOC problem, and should be solved by *gasp* the players talking to the DM. How is the DM and her husband supposed to know how you feel unless you talk to them? I swear, I just don't get how gamers seem unable to communicate when it comes to RPG's. It's really not that hard to bring up something that's bothering you about a game - preferrably get the other players on board, then say, "Hey, DM - you know, I've been unhappy with the discepency in levels, and how we are noticeably weaker than your husband's character. Could you fix that?"
It's not like you're calling them jerks or anything - it's a GAME. There shouldn't be any competition, or ego's involved here.
As for the husband, if ANYONE told me I didn't prepare spells well, while he knew what encounters would be faced, me and him would have a talk. In front of everyone. He caused the problem - not me having a problem with it.
As for the pegasus- what the heck is a baby pegasus going to do for an 11th level wizard?
I'm blanking on how it could be helping him. Have you looked at the pegasus's stats in the MM? Does it go into combat? If so, it should be dead in one round. Full grown they only have 34 HP.
I'd be interested in the rules aspects of your problem - I predict that you are not a powergamer, and there isn't a person in your group that knows the rules WELL. 2 Manticores SHOULD be no challenge for an 11th level wizard.
"(I should note we were travelling with two NPC's of epic level, but still)"
this is a sign (to me) of a big problem.
I'd guess that the DM likes controlling things, and isn't OK with anyone other than her NPC's or her husband's PC dictating the flow of the story.
It's the sign of an inexperienced DM, that has to control the story by having characters under her control that dominate the PC's.