Its normal to feel jealous. But you have to remember........this was a long time ago...... Things have changed. She obviously isn't with the guy.....and she probably had the big elaborate wedding becuz it was her first wedding. Some women choose to have the second one like that.....but others probably feel....why? I mean its one day....and super expensive.....and the day goes by in a big blur.
Anyways......also keep in mind she had kids with her first husband. Even though she doesn't have those feelings for him....she is still tied to him thru them. I mean.....she is probably hanging on to those pics for her kids sake. So they have something of their parents....when they get older...
My friend recently got married......and her husband and her decided to get rid of all pics of their ex's. THe only pics she didn't get rid of.....were the ones of her daughters father.....becuZ she wanted something for her daughter to have....to show her there were once happy times.
Don't be jealous......shes with you now.......and not him. Its her past.......and everyone has a past. YOu have to respect that.