DP and I are engaged to be married but I have a 'tricky' family background & a very traditional DM but am struggling a but with guest lists.
We are paying for it ourselves, to be clear, but it's still a big of a minefield. Tbh I would merrily run away, but DP wants a big family party.
Anyway, one side of my family effectively estranged (we do talk as it was a long time ago, but lots of water under bridge etc. so I never really saw them growing up). Thus I wouldn't invite and everyone okay with that.
Other side of my family, I have much older cousins (parents age) who I like well enough but wouldn't be fussed either way, plus my uncle & cousin who is much closer in she. Uncle is a grade A arse & cousin just the same. Nothing heinous but growing up treated DM and our side of the family like second class citizens for years and if I wasn't related, I would avoid due to big headed arsey behaviour.
All good - avoid cousins yes? Except DP wants his cousin to be an usher. He's much closer in age, not an arse
but they only really keep up online because we're all scattered all over the place.
I'm fine with this, but DM says if we invite nice cousin & his wife, we must invite all my cousins and partners (except the side of the family we don't invite 
AIBU to think that since I only see the buggers at weddings and funerals we can invite who we like? I have just about accepted that we must invite arsey uncle but surely could paint nice cousin as 'really close since they grew up together' (true).
I am not short of funds but the difference between 3 people (nice cousin, wife and brother) and 16 people (before we consider their 12 kids ffs) is quite a bit and frankly I don't want people I dislike and who don't like me at my wedding !
Do you really need to have exactly the same rules of both sides? My family significantly bigger than DP's...