thats not what happened. I think you might be referring to X-Force 28 when Reignfire dropped Gyrich and Dani and Locus aimed at him. Sunspot flew for the first time to save him. He absorbed the blast and redirected it back at Locus. Dani wasnt even targeting Bobby not was he in any danger
Taking Annie out of hte equation, Lorna and Alex had no business reuniting, let alone getting engaged in that period. She had alot of undealt trauma from that relationship to the point where she fell into a major depression when he "died" and her head was all messed. He himself was coming straight off of Mutant X and that messed with his head as well as i think his memories were off. Them reuniting felt more like trauma bonding bc they were a familar place to each other but it was always a toxic recipe for disaster. If anything Annie helped him to move even if that came with its own set of problems. Lorna realizing that she did not need him and could co-exist in the same space as him and be okay was a profound moment for her and is a shame that development didnt last long
I think Alex and Maddie are toxic in their own way (I think they are very co-dependent) but I do feel he has been good for her. I think they are safe as long as her redemption lasts and I dont see a heel turn anytime soon given what it took to get her to this place.