I've helped out once (in fairness I was asked to though by the WL I was with). Totally worth it. Still reaping rewards. 10/10 would do again.
Plus, regardless of what the mamasan did, I doubt it cost him that much money. It's a knock house in Bankstown, not PPP. Not worth hitting her. I mean imagine if everyone Angie stitched up gave her a slap? She'd look like McGregor in the 10th.