I'm sure it's been said a million times already. But TITS. TITS TITS TITS. Where are Abby's TITS? If she's supposed to be MTF, he would have found the last padded bra in existence and stuffed the crap out of that, even if the estrogen pills to grow some moobs aren't available.
If she's supposed to be a true and honest wamman SHE NEEDS SOME FUCKING TITS. I don't care if you can dig up the one powerlifting XX ladydyke with a chest as flat as a washboard...that's not the norm and it makes your character look freaky and wrong. Most female Olympic weightlifters and professional powerlifters still have tits. If she's eating the calories required to grow those beefy arm cannons, her body would definitely sequester some of those calories into TITS.
People will buy into all the big beefy lady arms you want battering your pregnant lesbians, as long as those arms are attached to a couple at least B cup TITS. I'm not saying it would FIX this mess of a broken down car wreck, but it would at least give the car nice, round tit shaped wheels instead of the square rocks we're supposed to accept this thing rolling around with.