This is an excellent point. Who really tested and who shows up in each other's matches?

If they all tested at the same service, and boyfriend matches his mother and his kid but the mother and kid don't show up in each other's matches, then there are a bunch of genetic genealogists who would love to talk to these folks and examine their test results.

And yet again, in any case, and to reiterate LW should not scramble her DNA with this guy, at least not unless she wants to be a single mother of *four* kids.