Unsure if I'm being overly sensitive or unreasonable so I'll leave it up to you..
Some background, DP has recently reconnected with his DB, I've only met him a few weeks ago and seen him a couple times since then. Myself and DP have 2 DC under 3 and we are currently going through some financial difficulties so are cutting back and only buying what is needed and necessary.
DP had his brother stay over for a night last week, which I was fine with. BIL likes to smoke weed, so I told DP to let BIL know that he wouldn't be able to bring any as we don't allow drugs in or around the house.
Fast forward to him arriving, I find out from DP that he has indeed got some weed in his bag for the both of them. Now I obviously am a bit miffed as I said I didn't want it at home and DP assured me he wasn't bringing anything.
Later on in the night DP and BIL have had a couple of beers and smoked (outside away from house) and DP is completely off his face. I storm off to bed, childish I know.
Once BIL had left the next morning, I tell DP how upset I was that he ruined the evening, getting drunk/high, bringing drugs in the house, he apologizes and says it won't happen again, but he didn't know he would bring any.
However I have now found out, from seeing messages on the shared laptop, that he knew BIL was bringing weed and had then asked him to buy him some, and not to tell me which has seriously pissed me off. Overall he spent £35 on alcohol and weed, which may not sound an awful lot, but at the moment for us, it really is, and of course the fact that he lied to me about it.
Whenever BIL comes to visit, they drink more than they should
If DP goes to visit him, he comes home incredibly late and drunk
He seems to rank his brother higher than me, changing 'wedding' plans to what his brother prefers.
It seems since his brother has resurfaced, he's changed and not in a good way, but then I feel like I'm being ridiculous and over reacting and this is just how they are