No, no, a thousand times, no!!
You're reading way too much into what's going on with Marigold and Angus. OK, he's snarky and witty, but he's also trying to treat his roomate as less of a shut in, and more of a friend. Marigold may get hurt, and Angus may be oblivious, but it's not intentional on his part!
There's not a line in this conversation that's intentional double entendre, either. The whole joke is that's it's an innocent conversation about the dancin' in the last two strips, and the punchline is how we read it!
Like Jeph said in a tweet, "That comic's gonna be quite the surprise for people working backwards through the archive in the future."