a bit of background for you, DP, DD and I live with a lodger as we can't afford to rent somewhere on our own. Said lodger has become both of our best friends and almost an uncle to DD, we consider him to be part of our family. We've all lived together for many years and had no problems.
My sister, as much as I love her, is a drama queen, always attention seeking and seems to have a different boyfriend every week. She moves in with the guys far too quickly. I've mentioned to her on several occasions I don't agree with the way she goes about things.
We've known that lodger and sister have talked on occasions, that's fine with me, then my sister started to call him when she was drunk making out that it was all just friendly and that she didn't want to give him the impression she was leading him on that she didn't like him like that and in her words "I would never want to be with him". Now, it turns out they've been having a relationship for weeks lying to us the whole thing just feels weird.
I'm more concerned about lodger as he is a kind hearted gentlemen, who is completely not her type and she's already trying to change him. In my view she's exhausted all other options so lodger is her fall back guy (there is other evidence to back this up but I won't go into that). I'm upset as this will affect everyone.
when it all ends, which I hope it doesn't for their sake, my DP and I will have lost a best friend and our DD will have lost someone who was like an uncle to her. Even now things don't feel the same, the atmosphere is very strange.
my other concern is that if they break up lodger will feel awkward and move out, thus meaning we can't afford to live in our house anymore (or anywhere else for that matter). or even if they do go the distance, going on my sister's track record, in 6 months time we will have no lodger as well as they'll have moved in together.
I really don't know how to take all of this, if anyone has any input of how I should handle this I'd be very grateful, I really don't want them to feel like I am controlling what they do though.