Otrogen flickvän… :(

Jag har en kompis i USA som jag pratar ganska ofta med. Nu har han fått problem, här är ett mail från honom. Vad ska jag ge för råd? Snälla hjälp! :(

So lately my girfriend has been working alot of late shifts, and for the past couple of months she has been carsharing with a male co-worker. At first I didnt mind in case she has car trouble or something like that, but it seems they have become a little bit more than friends. You know the scenario, the phone calls that hang up, she starts wearing nice clothes to work and talking about him all the time then abruptly stops leaving an uncomfortable silence.
If im out in the garage when she gets home (usually after midnight) he just drops her off and leaves, but if the lights are off in the garage and I'm in the house (they think Im sleeping) they sit out in the car for like twenty minutes.
I asked her once what they were doing, and she said
"Just talking" ....whatever. So last night I decided to see whats really going on out there. So I leave the garage door open ,and turn off all the lights.
About the time she usually gets home, I go out in the garage and wait.. In a few minutes, his car pulls into my driveway,and Im hiding behind my BMW. When his headlights shine through my garage and onto the car, I see something that I just couldn't believe. The rear camber is severely wearing my rear tires. Now I have to get an alignment. Should I go with -1.5 with 1/32" toe out or just leave the toe at 0?