Wow. Hopefully your parents won't "bail him out" anymore, as that is apparently enabling the unhealthy relationship. In short, he gets "rewarded" for being "in trouble" because of this woman.
Hopefully, he gets some emotional help and dumps her negative butt.
Worst case scenario, he knocks her up and gets tied to her forever via some un-wanted baby that becomes a ball and chain, perpetuating the bigger problem. I truly hope your brother is better adn smarter than that and gets out of that situation and into a healthier one ASAP.
Help! Crested Geckos! 0.1.Leachie, 2.1.1 Gargs, 1.0 Chahoua, 2.1. Blue Tongue Skinks, 1.1. White Lined Geckos, 1.3. African Fat Tails, 2.2.0 Tokay Geckos, 1.0. Giant Day Gecko, 2 tarantulas