all on the in-laws

let me just say, i am so frustrated right now with my fiance's mom, it isn't even funny. first off, i didn't want kids at the wedding. except my flowergirl, since she's in the wedding. well, we now have an 18th month old coming... ok, i need to start from the top...
we had our wedding list ready to go. we had all the invitations made. all envelopes were addressed. we were just waiting till it got closer to send them out. (they've been ready since march). i told my fiance they are done and we aren't inviting anyone else. well, then his mom kinda guilts us into inviting her three sisters in which she is close to, i've NEVER met, and i don't even know how often they have seen my fiance, but it's not much. seeing as one lives in hawaii, one lives in NC and one lives far into PA. SO i have to make more invites. not that i minded, but i thought we were done. i had my fiance get the names of everyone from each family. knowing they had kids, but i thought they were all teens. when his parents came out to help us move, she asked if there were going to be any babies, and who was going to watch them. i said there might be one, but either the husband or my friend's mom will watch her. this is when i find out there is a baby with one of her sisters. i was not planning on finding a sitter. i believe it was concluded that if they wanted a sitter, she will have to arrange it. after all, she's the one that wanted us to invite them! so, again, i thought this was the end of that. i was wrong...
we get an email today saying that one of the sisters asked a brother or two if they were coming to the wedding. well, they said they didn't get an invite. so now she wants to know if we can send invites to the three brothers (unfortunately he has a HUGE family from aunts and uncles to siblings) even though she doesn't think they will come. AAAAAAAARRRRRRRGGGGGGGJHHHHHH!!!!!!!!!
here's the problem with that. 1. we have limited space on the stage. there are certain friends that were not invited because of limited space. i would rather have friends at my wedding then aunts and uncles that only come around once in a blue moon! i don't even think they know waht he looks like except through pictures! so by inviting them, we are taking a risk of them coming and not having any room on the stage. like i said, would rather have friends there. 2. i have to make MORE invitations!
now i am trying to be the cool bride, and not have any drama, and i was doing good! i thought my family would be the ones with all the dramas. nope, it would be his mother. i don't know what to do! i don't want to make more invites for one, i just don't want to make them, and second, what if they all do decide to come? huh? then what? everyone must sit on other laps? i have a slight safety net where i know my two cousins aren't coming (no surprise to me) and i know that i have two friends who are involved with a show that night, that won't be able to make it. so that frees up 8 seats, but again, with the whole invite a certain % more than what it will seat thing still has me a little freaked out. i know that if i don't invite them, she will still somehow get it in a conversation and make me feel guilty.
OH! and if her sisters come in in time, she wants them to come to the rehearsal dinner! ok, now on this, she's paying for the dinner, so as long as those that are involved in the wedding are accounted for, it's not as big a deal, except that i only wanted those who were involved in the wedding to be at the rehearsal. it never ends! i don't know what to do! i know that if i argue anything or deny anything, that she will still somehow, without knowing it, or knowing it, make me feel like shit! she's good like that. and she's good at making me feel stupid sometimes too. now i love her to death (but not as much as my mom) but there are just some things, i just can't handle! anyway, i think i have vented enough for one night. i am trying not to talk about the wedding much, but really! this needed to be vented. i'm sure everything will work out, and i will be so engrossed at being a newly wed and partying that i will forget all this drama. but for now, it's drama. ARG!