Moving on too quickly with no regard for the feelings of your children or friends, definitely depends on the character and personality type of the man (or woman).
Narcissism sadly doesn’t typically lessen with aging, and there are plenty out there that are just looking for a new ‘supply/replacement.’
My husband and I sadly experienced this when he lost his dear mother a few years ago to cancer. She was a very kind person. She was married to my father in law 42 years. He’s always been a more selfish type, but his behavior after she passed was downright disgusting. He started acting shifty as soon as she passed. Grief is different for all of us, though there are certain behaviors that clearly show a persons true colors.
He was all smiles and laughs at the funeral which was incredibly off putting. Turns out he’d joined an online dating site, and some believe he may have done so before she even passed. Just awful.
To make matters worse, he called my parents on my mother’s last birthday, when she was terminal with Leukemia. She didn’t know he’d been in a new relationship. We didn’t tell her because she was very ill and knew it would upset her. He proceeded to brag about his new girlfriend and what a great cook she was. It was terrible. It upset my mom and worried her that even after 55 years of a loving marriage to my dad, that he might do the same. He hasn’t. She’s been gone nearly three years and my dad is still speaking kindly of her every day. It’s so sweet. He is a handsome senior man and every time we’re out he has ladies flirting with him and he says ‘no way, my heart is your mom’s forever.’ Even if he did find someone at this point, he’s handled everything so well and respectfully during his and our grief that we’d be accepting of it (as long as she was a genuine good person).
Sadly, we have a very diminished relationship with my husband’s dad now. His selfish and clueless behavior affected everyone. Many psychologists say there’s no ‘too soon’ timeline with moving on, but that’s simply not true. There will be a falling out with those close to you if you have empathy deficits and only put your interests first, especially while those who truly care are suffering through deep loss.