My cheating wife.....

As true friends, I need your opinion/help. Really need your advice for a serious problem. I have suspected for some time now that the little woman has been cheating. The usual signs; phone rings, if I answer the caller hangs up, going out with the girls a lot. I try to stay awake to look out for her when she comes home but I usually fall asleep. Anyway last night about midnight, I hid in the shed behind the boat, when she came home she got out of someone's car buttoning her blouse, then she took her panties out of her purse and slipped them on .......... It was at that moment while crouched behind the boat I noticed ... a hairline crack in the outboard mounting bracket ................ Is that something I can weld or do I need to replace it?