Son's wedding

Need some unbiased input because I am making myself crazy.  My oldest stepson is 26 and in the military.  Every time he comes home - about every six months - he has a new fiancee, ring and all.  Most of the time we don't meet these girls because they don't live near us, also don't live anywhere near him, the one in April lived in Las Vegas and was supposed to visit while he ws on leave but it never happened.  So about three weeks ago he is on Facebook that he is in a relationship with a new woman. Only difference is she lives about an hour from us.  Still, this is not someone he has spent time with recently although she did date his best friend at one time and has a six year old son with him, which I didn't find out about until last Friday night.  Also has a two year old daughter.  My son got home late on the 1st, went directly to her house and then came to visit us on Thursday morning.  Stayed for a couple of hours, made plans that he was going to cook dinner for the family on Friday night which was a joke because he was supposed to be here at 4 to start cooking for dinner at 6 which included his siblings, sister-in-laws, niece, nephew and grandparents.  When he wasn't here we cooked instead and fed everyone on time.  Half of the family left before they got here at 8, about a half hour after we found out that the newest girlfriend had kids.  He had talked to his dad earlier in the day and told him they planned to get married on the 8th (Wednesday) but nothing was said while they were there and again nothing was said when he came to church (alone) with us on Sunday or at lunch afterward.  I babysat for my grandkids on Tuesday night and my daughter-in-law asked if we were going to be at the wedding the next day.  Since nothing had been said any time we saw him - only saw her the one time on Friday - I figured it wasn't going to happen.  Daughter-in-law said they were getting married in the courthouse in a town an hour away - 4 minute ceremony - at 4 o'clock on Wednesday.  Son called at 11 Tuesday night to tell us when and where it was.  For the record, he is my favorite of all three sons but the fact that he waited until the last minute to even tell his dad what was going on just ticked me off.  I did not go and neither did our 10 and 14 year old kids who still don't even know that their brother is married because I didn't tell them and I know my husband didn't either.  Hubby came home and started to tell me about the service to say that it was even shorter than ours and that is all he got out before I told him if I wanted to know about it I would have gone.  I have nothing against the girl that I know nothing about, my reason for not going is that there was no reason to rush into it.  He's not going overseas, she's not pregnant, and they spent less than one week in the same city before getting married.  My concern is what happens in a few weeks or months when they are in the same city and they decide, oh well, we made a mistake?  They aren't the only ones involved, there are two kids to think about too.  He already has a big tattoo on his forearm with the name of a former girlfriend's daughter - heard him lie to someone else that it was for his friend's daughter who died - and last I heard the kid was alive and well with her own facebook account!  Have no idea what he has told this woman, can guarantee it is not the whole truth!  Love my son, just not happy with him.  Guess I am looking for someone to tell me why I was wrong, already have some friends who totally agree with my reason for not going.