And before anyone says it - he wasn't buying me a present or organising a surprise, he's not that type.
The other day he left the computer and I jumped on it. I noticed he had a private (incognito) browser open which to be fair, had nothing dodgy on it but the very fact that he had normal browser windows open and then this private one behind them was enough for me to question it. He denied all knowledge of it and then said it must have happened accidentally. A private browser window does NOT accidentally open. When I said this, he got flustered and said he didn't know why it was there. I left it.
But I didn't forget about it. Maybe because 4 years ago, in the early days of our relationship he was caught out using dating sites and casual sex sites. This continued a year into our relationship. The cynic in me says why would a man, who has previous form for shit internet behaviour, who does NOT have form for buying me internet based surpises - be using a private browser.
Or AIBU?