It really looks like some-one has questioned your decision to cosleep and continue breastfeeding and you are looking for validation. What you do would not work in my home, but every family is different. Obviously you can stop breastfeeding at night whenever you are ready. Your daughter no longer has a physical need for the milk(other than helping her immune system), but if the two of you need the bonding thats fine as long as you are both getting enough sleep(which could be a negative for immunity). You really need to ask yourself these few questions to decide if its time to stop cosleeping:
1. Is your daughter getting enough sleep to be happy and healthy? My twins need 12 solid hours at night plus naps and I can't spend 12 hours with them in bed so they need to know how to sleep in their cribs.
2. Are you getting enough sleep and quality sleep to be healthy, happy, and productive? If lack of sleep has you moody its not good for your husband or your baby, but if you are doing well on the sleep you are getting thats just fine.
3. What is the state of your marriage? Is your husband asking if its time for the baby to sleep in the crib? Are you and your husband getting enough time for bonding and intimacy? Does having someone else in your "refuge" mean you as a couple are getting farther apart? If any of these are becoming an issue I think that you need to realize that anything that jeopardizes your marriage is BAD for your daughter. Way worse than CIO.
If you are all getting enough sleep, your marriage is not suffering and your husband also enjoys cosleeping with the baby then by all means enjoy the bonding time that you are getting.
For honestys sake and so you can see where I am coming from - this is what we did in our home:
With Twins cosleeping was never really an option for us - in fact we didn't even share our bedroom with our kids except on the few days they were having a hard night (and then if we woke to a sleeping baby they went back to the crib. My husband is also a pilot so his sleep on flying days is a matter of safety for not just my family but others too. He did always help on non-flying days though. I got up to breastfeed the babies, and then to bottle feed them and pump when breastfeeding didn't work out. My kids have always slept in their cribs so unless they were sick they've never cried more than 20 minutes about being in their cribs at night. For us, I love the fact that our bed is for my husband and I - its a place of refuge and bonding. Also our kids need lots of sleep to be pleasant people and I can't stay in bed with them from 7 to 7 when they normally sleep. As for Crying it Out we've had to do it for naps, but never at bedtime. I don't like doing it, but after not doing the CIO for a while, I can say that the time they spent crying in thier cribs was no more than the time they would have spent crying later if they didn't get enough sleep.