Husband works long hours. Tired and difficult to engage with when home. Travelled with young, female work collegue (8 hours in car together ) to meeting but didn't mention it, only discovered with later 'slip of the tongue '. Seen texts to her calling her by pet name. Seen texts to him saying 'thankyou for leaving my favourite sweets on my desk'. Goes in to office at weekends to do work with her. Denies anything untoward so I'm just waiting to see if/ what happens.