There is simply not enough information here to say one way or the other. On the other hand, there is probably too much information needed to make a posting here practical. I suggest you contact an attorney in your area, preferably one familiar with personal injury matters or special needs trusts. Assuming you had an attorney handling your late son's claim, he/she should be able to answer your question.
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Sorry to hear of your loss. You should consult with an experienced lawyer to discuss your situation. The amount of money recovered on behalf of your son's estate will depend on the amount of insurance the various vehicles had, the amount of supplemental underinsurance and uninsurance if applicable that vehicles in your son's household had, the liability (how the vehicles were responsible), the number of individuals injured in each vehicle and if there was sufficient coverage. Your sister's benefits may be effected, however more information is needed to give an informed opinion. Feel free to call an attorney of your choosing to discuss the matter in depth. Most personal injury lawyers give free consultations.
If this answer is helpful, then please mark the helpful button. If this is the best answer, then please indicate it. Thanks. For further information you should see an attorney and discuss the matter completely. If you are in the New York City area, then you can reach me during normal business hours at 718 329 9500 or www.mynewyorkcitylawyer.com.
If you're talking about SSI benefits, they may be affected depending on how much money you recover individually, but talk to a personal injury lawyer near you for more info. Good luck and sorry for your loss.
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