My fiancé is going to his mum’s new holiday home this weekend to do some stuff like cleaning, organising, gardening etc. I’m out with friends and not going. He said he has asked his (female) colleague to go with him for the day. I’ve met her briefly before (she was really nice) she is single and very attractive. I know they are good friends and occasionally meet at lunchtimes during the week (we live not far from each other). I’ve never suspected a thing but the thought of them spending a day together a few hours away feels a bit odd. Should I be worried?