"What kind of abuse was it? I'm not sure I believe him, sorry."
Nice. What don't you believe? That men can't suffer abusive relationships or that people in abusive relationships (male or female) don't find it hard to leave?
Have you not read about men and women who stay with their abusive partners for years? Who, for a number of varying reasons can't see a way out, whether kids are involved or not?
I've been there. Not for seven years, fortunately, but I was physically and sexually assaulted. Nearly lost my job, was put through a shit load of EA, had my friends cut out of my life (or rather allowed that to happen).
I (the man, no dc involved) stayed for a lot of different, changing and sometimes conflicting reasons. At first, because I felt an LTR was "for better or worse," and that what she'd then done was a short term blip. Then because I thought it was down to grief, then because I couldn't see where I'd go... and a lot more besides.
I reported to the Police, once I got over the shame of being the man and yet the victim. Three times, including very obvious injuries, and they couldn't have been less interested in helping me. EVERY SINGLE TIME.
So I won't automatically disbelieve someone (of either sex) who won't get out of a relationship/marriage, despite that being the screamingly obvious thing they should do, who tells me they're being abused. If he's had the opportunity to sleep with OP and turned her down then, tbh, that reinforces it for me because otherwise, if it was a sympathy ploy, he'd have had the physical affair.