Toriel had an incredibly loving marriage with Asgore in both Undertale and Deltarune. In Undertale she broke up with him because he swore to kill every human that would fall into the Underground, and in Deltarune she broke up with him due to an incident he has been seen working to disprove in secrecy.
Provided that Asgore is correct and whatever caused Toriel to break up with him turns out to not have been his fault, SURELY they'll get back together, right? Right???
I think I'm one of the few people who ship Asriel (Asgore x Toriel)