Married with children. Wife miscarried 3 times 5 years ago, and has basically gone off the rails. Behaviour got so extreme I suspected bipolar, and after a difficult discussion she decided that a consultation was going to be potentially helpful - saw a psychiatrist, and indeed was diagnosed with this. Given medicines, which she took for a month or so, then stopped. By off the rails I mean increasingly irrational, drinking heavily (infrequently but when she does it's to oblivion) , disappearing and being uncontactable , sexting (with photographs), lying, and infidelity. Currently meeting a lover 2 or 3 times a month, including for blowjobs in his car and fucks at his flat. Denies everything when confronted - violently so.
Not looking for sympathy - what I'd like to know from women is whether this is within the parameters of grief, and if any of you have done the same sort of stuff - and if so, any advice or comments. From where I'm sitting, all seems pretty bleak as regards seeing how to recalibrate things back to what I think a marriage should be about - because this doesn't feel right any more.
Thanks.