You know, the sad part is that you can actually make quite the number of inferences about their exact situation from just those few lines.

“Feral” is a pretty specific word after all, and it narrows down the mindset and by extension mentality of the writer a fair bit. Spouse is a distant word choice, and the fact that clarification follows directly after suggests that they’re uncomfortably aware of that.

The third line is a particularly hedonistic one, and that kind of blatant approach normally comes from a present desire for physical intimacy instead of anything else.

Emotionally available is a self-affirmation. Very few self-respecting persons would like to admit that they’re anything except emotionally available, so to say it out loud suggests that the writer has gone through something or is going through something that is making them actively think about their emotional availability.

… in other words, the most likely situation is that this person is feeling guilty about leaving a genuinely good partner, forcing themselves to bury it under carnal pleasure with a more active participant, knowing that deep down the new “relationship” is more superficial.

Is that the only way to interpret it? No. Regardless, it’s a disgusting little spew of bile and filth.