Do we go against DH's family on this?

[AvaLou]

DH's sister, who is 18 this december, is coming to stay for the weekend with her boyfriend. They have been together for two years and she is very sensible.
I know that they are not allowed to share a bed at her mothers house, but I see no problem allowing it here. It's not an issue I want to bring up too, so I am thinking if MIL says nothing, we will just go ahead and let them. Is this wrong?

When my middle bro was a similar age, he had a gf whose parents were very strict, and my parents used to make up separate rooms and basically say "we don't care or want to know what happens". If you have the space, I would just do that and leave it up to them.

maybe htey will jsut go to sleep

They're in a long term relationship (2 years!)

They're over the age of consent.

It's none of her Mums business where or how they sleep, although I understand why she does the 'not in my house' thing.

I'd back up a camp bed in the spare room, and let them decide whether they are using one or two beds, that way neither you or your MIL are deciding for them.

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say

" oi mum
beak out"

s
l
a
g

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If the "safe place" is your house i feel that gives it your approval and mine won't have my approval until they are living together. Shagging in cars never did me any harm although it did make me think twice about whether I really wanted to do it, right here and right now or should i wait until double chemistry and his mum's gone to tesco's ;)

lol

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Shes a grown up, let them share a room.

My mum thought I was at it earlier than I was, so when I was she was much more relaxed . She didn't bat an eyelid when I started sleeping out at DP's place (I was just 18).