Let's think...are there ANY other reasonable possibilities? Like, do the kids play with his phone? I dunno.

The other thing to always keep in mind, is that even if he calls her from time to time he is with you. He could have gone to her if he wanted, but he came home. I know he still needs an a$$-kicking if he is still calling her, but how gratifying could their r be anyway when he blatantly turned her down to come home to you?