text: That's a tough situation.  The only things I could suggest would be to ask her to try to help him learn english as well, since it's essential for his future schooling.  Obviously you've tried this approach, but it doesn't hurt to continue.  Secondly, whenever you do have him, spend alot of time talking to him.  Try starting with just pointing things out and naming them constantly.  At his age learning in two languages won't be that difficult, but since you don't have him anywhere near as much as she does you need to be extra vigilant.  Point out everything you see, objects, store names, actions, etc.  You may think you sound stupid, but it'll get through to him.  And also I'd suggest getting him some age-appropriate videos (and VCR or DVD player if she doesn't have one) that he can watch at home.  Watching pre-school/toddler programs in english will definitely help.  My son has picked up so much watching these things and we speak english anyway!  Good luck, and just count your blessings that you have your son, and that with your help he will grow up bilingual!