Partner of 4 years cheated 2 years ago. I caught him sexting her. He had cheated in his previous partner with same woman. Woman is related to his ex partner. When I caught him 2 years ago he had picked up a distinctive laugh. Anyway a few weeks ago he took his old phone out of storage and it's been on his desk for weeks. He hasn't used his smart watch in about a year but has suddenly decided he wants to wear it again. I caught him 2 years ago via the watch. At weekend he did the same laugh. I said absolutely nothing. Later that day he brought it up saying oh, you know that laugh you hate. I noticed my daughter does it. He said that 2 years ago but cited a different daughter. Obviously he swears there's nothing going on. Weekend was a blow up and now he's booked a trip away and is being extra lovely.