Sandy...
Wah your SIL never take precautions?? There are a lot of protection choices out there... Pills? IUD? Good ol' rubber.. I mean cannot anyhow make bb lor.. When I was younger, I made sure I take precaution cos I knew I wasn't ready.. but if anything happen I knew I would keep the bb lor.. but luckier when I wanted, my girl came..
I think basically, you have to be smart about these things.. A bb is life, cannot like anyhow play play, have already then abort..