I agree with shell - if you're happy to do it and bub is happy there is no reason to think you're doing the wrong thing.
What I wouldn't GIVE at the moment to be able to have my DS fall back to sleep with nothing but a breastfeed.....
We've been through about a month of illness and teething and he's totally forgotten how to self-settle. Totally forgotten. he's waking up every 1-2 hours all night and I'm nearly beside myself after a month of this. Not even boob will put him back to sleep anymore.
I guess what I'm saying with my whinge is that it could really be alot worse - at least she IS still settling for you so I'd go with it.