Went round to see OH this evening. He picked me up so he knew I was going ot his place.His computer was on at his email screen and I noticed a subject line in his Inbox was a confirmation of a hotel . Booked in the name of 'Miss 'Initial Surname'. The booking reference code was also visible. (I didn't open his email. this was all visible right there on the screen). I memorised the booking code then went to the loo with my handbag and wrote it down.
Just got home and went on the hotel site (it's one of the very well known chain hotels) put the booking reference and name in and found the booking. It's booked in the name of Miss Initial Surname, for four days, Monday to Friday, and a family room has been booked. One adult and 2 kids. It's a hotel that's about 10 miles from where OH lives, quite close to his office. The contact phone number on the booking is my OH's mobile number

OH doesn't have kids. As far as I know he doesn't have anyone in his past with the initial of this woman.
Obviously I'm suspecting something really bad. But a few things don't add up. The fact that the booking is 4 days midweek. The fact that she's got two kids with her. Why did he book it in her name and not his?
Any ideas??...can this possibly be something innocent?..
What should I do? Confront him now or observe how he behaves during the days she's booked into this hotel?