Can I be bound by two sponsorship undertakings for two different spouses at the same time?

Yes, in principle a sponsor can be bound by more than one active sponsorship undertaking at the same time — for example, an earlier undertaking still running from sponsoring a previous spouse, alongside a new undertaking being given for a current spouse or partner. Having one active undertaking does not automatically prevent someone from sponsoring again later.

That said, sponsor eligibility rules look closely at someone's overall situation before approving a new sponsorship, including whether the sponsor is currently in default on a past undertaking or otherwise disqualified for another reason. A prior undertaking that's being properly honoured generally doesn't block a new one, but outstanding problems with an earlier undertaking can affect whether a new sponsorship is approved.

It's also worth understanding that a new undertaking doesn't cancel or replace an old one — both obligations continue to exist and run on their own separate timelines. Taking on a new sponsorship while still bound by an earlier undertaking is a significant commitment, since you would be responsible for both simultaneously. If you're considering sponsoring again while an earlier undertaking is still active, it's worth speaking with an immigration lawyer to understand your full current obligations before moving ahead.