Would the following make you suspicious?
My husband's working hours were such that he would be at home certain times of the week on his own until the kids come home from school. A local woman has a daughter who is friends with mine and whose daughter would be at my house every now and then.
She sent me a couple of texts over a few weeks mentioning she had been at my door while my husband was there and I was at work, with whatever reason (to ask about something happening in the street and something else I can't remember). It got my spidey senses tingling.
One day during my husband's normal days at home, he had to be at work for training. I came home early from work but didn't tell him. Lo and behold, this woman comes to the door. She seems to be acting a bit strangely (nervous chatter) and says she has lost her keys. I asked her if she wanted to come in, and she says no. So I asked her why had she come to the door then?! She realised, I think, that there would be no logical reason for her to come to my door with this strange 'lost keys' excuse if she didn't come in. So she came in, I made her a cup of tea, we chatted, and she leaves once she knows her daughter (with key) is on her way home.
On her way out the door she says something like 'oh is this not one of days at home?' I say oh not today. And off she goes.
To me, this woman was coming to the door expecting him to be in alone. Can't be many reasons why except the obvious, to my mind. Husband denies this strongly and can't think of any reason why this woman would have come to the door.
AIBU to think he had been having an affair with her while he had the house to himself?