I've just had to deal with my worst nightmare. I was stood at the bedroom window watching the DC play at the park with DH when I noticed a tiny orange spider on the window, then another, then about another 50! I think they've obviously hatched somewhere near the window frame and have crawled inside. Once I started noticing them I could see them everywhere...on the window, window sill, on the curtains!
I have got rid of all the ones I could see and have cleaned the whole area to within an inch of its life. I also came across a huge spider hiding where the smaller ones were coming from, after much screaming and throwing things at it I also managed to get rid of that one. However things took a turn for the worse as I then saw another big one but it ran in to a crack in the window frame before I could get to it.
So now the house belongs to the spiders