Do I lose my spousal support from my 1st marriage if I re-marry?

Not necessarily. One would need to consult with a family law lawyer to discuss the objectives and purposes of the spousal support being paid to you. Cohabitation or remarriage is only one factor to consider in determining entitlement to, form, duration and quantum of support. Courts consider the economic circumstances of the cohabitation or remarriage in the context of all the circumstances. The fact of a subsequent marriage does not mean that the reasons for the support being paid have somehow disappeared or are no longer issues. Sometimes the effect of a long term marriage is simply not addressed from re-partnering and going into a subsequent relationship.