So sorry you are having to deal with this OP
especially at this time of the year when you are fasting, and shaytaan is supposed to be locked up!! I really do sympathise with you and the emotions you must be going through.
I just wanted to come at it from a slightly different angle, to offer what I believe could be a relevant perspective (I've lived in UAE for 5+ years and my DH is local)...
I can't tell from the screenshot you shared, but are the escorts 'ladyboys'? Although it is of course illegal in the UAE, there is a huge population of mainly Thai/Filipino TS escorts who hide behind the ruse of 'massage' work in seedy salons or hotels. It's something everyone knows goes on, but a blind eye is turned... and it is particularly rife in Ras Al Khaimah, which I noticed was the address given.
Assuming your H is from an Arab background, it is not uncommon that men growing up in that culture/society actually have their first sexual experimentations and experiences in their early teens with other males, due to the segregation/lack of social opportunity to experiment with girls at that age. Due to this, it appears that many men from this background are more aware of the male 'g spot' being accessed through anal stimulation/penetration. In most cases this doesn't mean they are gay or bisexual - they are attracted to the female form, hence why they go for 'ladyboy' escorts who look facially like women, have boobs etc - and they use this (horrible, filthy) outlet of escorts to fulfil that particular pleasure.
Often they are too ashamed or afraid to tell their wives that they enjoy this type of stimulation because they worry that it wouldn't be understood, it would be assumed that they are gay, or the wives wouldn't be willing to engage in that sort of sexual activity with their husbands (finding the male g spot, I mean, not getting involved with escorts!). Culturally there is a huge lack of communication and understanding on this point, and unfortunately that is why the men tend to secretly seek out these escorts rather than open the topic of what they would really enjoy doing with their wives.
I may be completely wide of the mark with this theory, but it could well be the case with your husband. I'm not in any way excusing his behaviour - cheating, lying, deceit, putting your sexual health at risk etc. is all inexcusable if indeed it was him who booked the escort rather than his friend - but this could be the reason or motivation behind it. You may be able to take some sort of comfort from this insight, or at least discuss with him in an open and frank manner.
Sorry for the super long post but I just wanted to get this thought out there! Wishing you strength in this Holy Month and beyond 