Tistheseason - there are two issues here, the most important being the 3 grand, THREE GRAND !!!! Secondly, the porn.
A different perspective here, and a bit of a confession. . Firstly, it is totally beyond me why your DP would have to pay for internet sex chat. I think its pretty much out there for free - i would point that out to him double quick!!!! I remember when we first got the internet and i discovered cybersex, i was pretty much addicted, honestly, the conversations i had, total strangers - mad. But it boosted my ego in a huge way, and just made me feel sexy. Why? God knows, i dont do it now, i think the novelty wore off. My partner was aware of it and was qujite happy with the fact i would be quite horny after sitting on the computor for an hour I think the point i am trying to make is, i dont think what your husband is doing is deviant in any way, i just think he has been sucked in by some dodgey website and the money got sucked away. You say, otherwise he is a good partner and father. Well, i think that is entirely possible. Whenever i was dallying around with internet sex, for me, it was total fantasy, like an outlet for my own fantasies. Its not lie we dont have a VERY imaginative sex life either, but its just somewhere to play out scenarios etc. I have never ever gone onto internet porn sites or looked at porn online. But i do understand why your husband has done this.
Lets face it, there is nothing like a baby to change how you feel about yourself sexually. It could be that your husband needs some time to adapt to being a dad.
The only advice is, keep an open mind, i would be mad as a pissed off snake about the money and you need to make it clear that is NOT acceptable, that money could have been spent on a family holiday FFS. But try not to judge the porn thing - easier said than done i know, but if you are prepared to listen and don't treat the whole thing as some sordid problem then i would like to think your DH may feel less inclined to hide things.
Don't let this come between you, he likes a bit of porn, so what, so do i - my hubby on the other hand just rolls his eyes and thinks im weird.