Hi @otroo. Please just see this as a situational argument/fight, not as an end to a blossoming relationship after a tragedy. I'd certainly hope it wouldn't be all that is needed for any negative change.

My mother died about 16 years ago, also suddenly and unexpectedly, like your wife died. I can say that when my dad started "dating" again, it made me upset, as your daughter is. My siblings didn't like it, either. That's very common in such cases. Very! But I now totally understand my father's (and your) need. I think 7 months is likely not overly premature --especially for men. [Forgive that I imply it's less so for one sex over another, but I believe the generalization could be backed up with data.]

My advice is to date "quietly". Your daughter need not hear about such dates until a serious relationship develops. Also, be careful that you, yourself, don't jump into or commit to a relationship prematurely. That can also be common with very negative outcomes. Being desperate to get companionship could make some people vulnerable to being taken advantage of by the wrong types, emotionally and even financially. With his last girlfriend, my dad started abusing alcohol, did shocking things in public, and went through the majority of his savings. She was happy with the gifts and wining and dining, but did little when he was in bipolar crisis.

When my dad started dating, he said some very inappropriate things to my siblings and me. As examples, he talked about a new companion way too much, gave details that children should not learn, invited her to holiday meals too soon after my mom passed (a few years would have been better), and even at one holiday meal he sat pawing at her in front of us and then declare she (the new woman) was the "love of his life". The latter, especially, is a total no-no, even if manic.