Well, this ought to be interesting. Perhaps MJ will enthrall Cat, followed by the two of them ganging up on Peter before having their way with him? Then again, I could be wrong.
I think is worth noticing that Peter and Felicia aren't fucking in the last two pages. He has his costume still on despite the hard on, and she is the one trying to fuck him, with him denying her due to her status as a "compromised spider" (IE his marriage). If this is a good comic that follows proper characterization, which, you know, you'd never know, he will simply leave and leave Black Cat hanging, swinging home to his wife and NOT cheating on her, MJ will see this and not get angry at him (Or get angry at him but decide to fuck him later as punishment but, honestly? He is very clearly not cheating on her up there that has to ammount to something given how low the bar is in these comics), but will still decide to punish Felicia for trying to steal his husband from her, hence the "corruption," infect her with a second Symbionte, and THEN, as someone above mentioned, have the two gang up on either him or, probably, a Gwen Stacy just to complete the set (With 4th comic being about Peter's corruption now that they are 3 to 1 of numerical advantage).