Thanks, everyone.

My partner has his reasons, and I fully understand them. We live in a nice but rather small 2 bdrm apartment and so have limited space for critters. Until such time as we have a bigger place, the number of animals I have must be restricted to fit in this apartment and not take up more room than our own things.

With the addition of the BTS, who will live in a rather large enclosure once he's grown, and the chameleon who's cage takes up half the dining room...well that kind of made it necessary to cut down on the snakes so all (now 12) of them could be in the bedroom. With the subtraction of Athena and Nagini I now have the space in there for just that.
There is also the fact that the two lizards are rather time demanding and I wouldn't have been able to take as good care of all 14 snakes plus them.

Thanks for the support and comfort... it really means a lot to me. I know this had to be done, but it doesn't mean I won't miss her.