In my opinion sobriety should come first and protecting it. Trust your guts, and if you feel this person is risky for you then maybe you should just avoid them. Tell your sponsor you want to discuss with someone who is committed to sobriety, as you're still in early recovery and these individuals may jeopardize your own recovery, when you're still below 3 months and so.
If they don't understand get a new sponsor. Just my opinion.