I'm not certain.
But if you observe behavior, past and present, its obviously they have become more affectionate to each other the past several months.
Add to that she prepares meals for him, she has recently dressed in lingerie to get bring his stubby to a stiffie.
Look at their behavior when they are in bed watching TV before sleep. She reaches out to him (and he to her) for affection. They caress each other. Their arguments are minimal (from what I see). If they didn't like each other, both would argue and critique each other all day and night.
There love language is evident. It may not be the same love language I have with my girlfriend (or you with yours), but they remain in love.