It all depends on the terms of the order, but it is extremely unlikely that anything about her financial situation or events that occur after start of pension benefit payments (other than her death or perhaps the death of your husband) would affect her benefit or the payments she is receiving. The QDRO is a property division. She got her interest in the pension at the time of divorce. Any post-divorce developments, such as her remarriage or you husband's remarriage or post-divorce financial fortunes, should not change what she got as a property settlement in the divorce.